Well, yes getting all the abilities of a 6th level Wizard would be to much advantage. But even in 1e/2e where you got the class features, best saves and best to hit, I never felt anything was broken.
No, it wasn't. Because you were a 2/2 fighter/mage or a 2/3 or 3/2...You're correct, it wasn't broken.
To go from, I've spent all my life, time, energy and experience learning how to be the best fighter I can be...and I've gotten to 6th level doing so. Now, I have a level and I'm getting all the bells and whistles, not to mention spells like fireball and fly, of a wizard
that same level when I've never picked up a spellbook or waved a wand before in my life?! How does that even make enough sense to suggest it?
In my own suggestion, you only get the features of that class for the level you take; I guess that makes the idea nothing more Han a gestalt system, where every class feature is a just like a feat.
Right...so you become a 6th level wizard...out the gate, day one. The level you took. Am I right or not getting what you mean? To me and my sensibilities, that is unacceptable. But, as I already said, I don't expect to see anything remote to what I consider fair and justified in the multiclassing. So it's kinda moot.
I don't want to see taking a level of a new class is taking 1st level of that class.
Why not? How does that not make the most immediate, sensible and "internally consistent" kind of sense?
It just leaves the character with sub optimal features.
Ah. The "o-word." If you are making suggestions and decisions based on "o's" and "sub-o's" then we really have no ground on which to discuss this.
I will simply retort that, in my opinion, it does not leave you with "suboptimal" features...it "leaves you" with features that you did not, previously, possess! That would be a boon/plus all around. How could it be viewed as "sub-optimal" will always remain a mystery to me. Now you can read magic, use magic items you previous couldn't, probably gain have Arcane Lore skill...and then there's the spells...which you previously couldn't cast...and yes, you start with the cantrips and 1st level ones...same as every one else who ever studied wizardry.
Again, my take, but whatever they decide almost certainly will not be the way I want it.