No, the reason the 'why' is important is because one needs to know what the end goal of the change is to comment on whether or not it accomplishes that.
I'm going to ask you in the nicest way possible to please stop derailing my thread by repeatedly asking why.
I will add this: The end goal of the thread is to discuss the change, if you want to get into nuances of when the change is good and when it's bad I'm all for that and I think that would actually make for a very interesting discussion.
Glad you can read my mind and know what I'm thinking.
I didn't have to read your mind, I just had to read your posts.
Though no, there are a lot of things in 5e that need design polish. The problem is that generally the designers of the game know how their system works better than someone doing homebrew; and their design has the benefit of extensive playtesting. That doesn't mean it's perfect, somehow the beast master ranger got through playtest, but it does mean that one should approach redesigns with caution or risk throwing the game's balance off wildly.
Posting a thread and asking for where this will throw off game balance wildly is being cautious. Care to actually talk about where it's going to throw off game balance wildly?
Removing something that is assumed in this edition, that casters have something functional to do with their turn even if they don't burn a resource,
You keep saying I'm removing a functional thing for a caster to do every turn, but all I've done is nerfed how strong the functional thing they can do every turn is. They can still do it. It's still resource-free to do it. Heck I even compensate them with extra spell slots for nerfing that.
is a big change to make without having a solid design reason why. The design reason, the "why," is critical as to whether or not your solution is a good one.
I never asked if my change was objectively good. In fact I could care less about that because there isn't an objective answer to that question. Instead I asked if you liked it (you don't and that's fine). I asked about where it would be wildly imbalanced and any other pitfalls.
Are casters too strong, and you think they need a nerf outside of their big resources?
I intend for change to be as power neutral as possible.
Do you feel cantrips in some way compete with martial characters and their damage output?
Nope
Do you want cantrips to just feel super weak and spells to feel stronger generally?
Nope.
There are a lot of reasons one could dislike cantrips as they are, and each one would require a different assessment and a different approach. In order to know if a fix is appropriate, first one needs to know the problem.
Or my change has nothing to do with disliking cantrips...
You getting defensive when asked why shows you probably shouldn't be asking the general public things like this.
I get defensive because it's an effective deterrent and I already know what happens when people ask why and someone answer that question. I've seen it to many times. Instead of discussing their idea, it doesn't get discussed. Instead what gets discussed is whether the reason for the change is legitimate, then it goes into what behaviors at the table are causing the OP to think that and finally a little may get said about whether there is some other different way that "solves" whatever reason was given. No thanks.
I don't have a problem that needs solved. I have a discussion I want to have about a change I thought up.
You're welcome, I suppose. It's still a totally relevant question if you are serious about wanting a critique of the homebrew.
Just drop it already?
Some groups play like that, some don't. This change would ensure that yours has no choice but to play like that.
Well my point wasn't that all 5e group play that way, but rather that not all 5e groups play that. You see by showing that criticism is applicable to some 5e games but not others, you "gave me an out" where I am now justified to say that criticism would only apply to some games with my rule change but not to all.
Why do you think it applies to all games that would be using my suggested rule?
I think the most important question to ask yourself is: "Would my change be fun for the players in my group?" I don't think it would. I don't think most players would enjoy having their already piddling at-will damage functionally removed.
I don't ever see players getting excited about cantrips. I see them getting excited about casting encounter changing spells which require spell slots. I don't see how nerfing something they don't get excited about and giving them more of something they get excited about could ever lead to less fun.
By the way there is a common argumentative tactic used where one constantly mentions the negatives but never the positives when it comes to a trade. You're doing that an awful lot. I just wanted to pointed that out.
It might be possible you've characterized my view inaccurately in your unnecessarily defensive response.
It might be that you don't understand my full dedication to not having my thread derailed with the question "why"
It depends, but mostly this statement wrong. If you have a melee character who can hit reasonably hard (assuming something like sneak attack, sharpshooter, great weapon master is present), the advantage on a big hit is going to far, far outweigh a d8 of damage. At level 11 you are probably going to have a melee character who can hit harder than 1d8+5, and the increased chance to hit and/or crit on a big attack is going to dramatically outweigh throwing a d8 out.
Sure if your a ranger with hunters mark or a paladin with improved divine smite or a character with sharpshooter or GWM that's true. But you didn't specify any of that. In fact you just said fighter. Fighter's tend to do maybe 1d8+7 damage per attack. Help action will give one attack advantage. Best case is you increase that single attacks chance to hit by 25%. .25*11.5 is pretty close to .5*5.5.... just saying...
Ignoring the question of "why" entirely, your homebrew is just a bad idea because while some groups have casters who go nova, run out of steam, and rest... your change would make that playstyle mandatory. Suggesting that it's mandatory right now, as you seemed to do earlier, is just not true.
The point I was making was that such a playstyle is not mandantory under current rules nor with my change.