I ran a campaign with home brew prestige classes and totally messed up the campaign because my "abjur knight" prestige class was so much more powerful then my "shadow assassins'" and "wonder maker" prestige classes that half way through level 7 (when everyone had 2+ levels of such classes) people playing the weaker two were looking at the biggest one (the other players too) and asking "Maybe we should all just take abjur knight"Uh...no, I'm sorry, flavorful homebrew is NOT easy to do. In fact, it's EXTREMELY DIFFICULT, that's one of the biggest problems I have with 5e. It presents this idea of being easy but it's actually really really hard to make a new class or a new subclass. People will RIP into you for it being too weak or too strong. People will oppose literally anything you do. I asked about PrCs, and was massively told "NO PrCs, those are HORRIBLE ROTTEN GARBAGE, just make it feats those are perfectly fine," except they aren't fine, because whenever people talk about feats, SO DAMN MANY then immediately say how horrible and awful feats are and how the game should never have had them in the first place. And new classes? Fuggedaboutit. There's been a near-constant push since the D&D Next playtest to eliminate as many classes as possible; even the "core four" aren't immune.
It's hard to write effective, balanced homebrew. It's harder still to find people willing to usefully critique it, rather than simply shout it down as unnecessary or wrong-headed. And it's damn near impossible to sell DMs on homebrew you find or make. The odds of actually getting to play homebrew you like are fantastically small unless you're already good friends with the DM, and I don't have anyone like that. LOTS of people don't in this modern, internet-heavy D&D culture we now have.
nobody knows...And...you know that this group is bigger than the group that's been frustrated by the caster/martial disparity for literal decades...how, exactly?
back in2e (when I think the balance was the best for non4e fighter/mage match ups) there were complaints... in 3e it was just the system... in 5e it is better then 3e but maybe on par with 2e maybe not... but no one knows for sure what group has the plurality