I think we're actually in agreement, just perhaps I'm being unclear with my choice of words for you.
I suppose, the system you envision above, the best possible system in terms of mass-appeal and game mechanical quality, still wouldn't be the best possible system for you. Or me. Or any one particular group. It wouldn't be our perfect system, because naturally, compromises would have been made, trading off our preferences against each other, until the game was a good as it could be, while still being good enough for everyone - not turning anyone off.
We would each have house rules, if we felt strongly enough about it, and we'd have things to grumble about. But those house rules and grumbles would be pointed in different directions.
I say this because I feel a game that perfectly appealed to everyone's tastes is an impossibility.
What I'm suggesting the 5E team are doing, is aiming to build that system, a conciliatory, unifying system. And then, as others said, they'll ladel on the optional rules so you can get closer to your perfect game and I can get closer to mine. But the core game will be the same for us both.