These threads are fascinating to me. The game is so flexible that you can have people who have such wildly different attitudes on how the game should be played.
with that being said, I am currently playing a barbarian shaman to the great snow leopard. He’s a barbarian 1/bard2/sorcerer 1/ warlock 1. I have a 13 or 14 in every stat but intelligence. He’s super fun And i reskin everything. Heck, I am a long tooth shifter mechanically but just say I am human an all the race abilities are a product of my connection to the snow leopard.
Most here have no attitude how "the game should be played". It is looking like that sometimes when the discussion gets heated up but:
1. There is no badwrongfun.
2. Everybody has his own preferences.
Most explain why they have these and those preferences in their game, and why they like it.
You can do Gestalt characters with 5e like in your example, the rules are absolutely flexible enough for that. But if you like such kind of classless systems, maybe try out DSA (The black eye) i bet you like it. I do.