I agree w OP. There are other things I dislike about VI that are higher on the list of why I stopped playing it, but if those were fixed and I got to 200 odd hours, I imagine I would be quitting for the civics mess
V's policy trees were incredibly flawed (every version of the game just shifted the "best" tree from one to another without adding balance). But evaluated strictly in terms of "making you care about the game," they got an A.
Two best things about V trees were: 1: Burying the largest happiness bonuses behind pre-requisits made culture really sexy. The pyramid system in BNW ideologies was a more varied analogue of the same thoughtful investment, so it was good, but flawed (it felt stupid to choose between several weak Tier 1s). And, 2: You were a-la-carte defining your civ as the game went on, adding your own chosen "uniques." Even though you had little control and no way to go back on base policies, the permanence did a better job of making policies feel like the leader's will imprinting on his or her citizens.
Now swapping policies and governments doesn't define my civilization, it just defines my next few turns' build order, ugh.
Anyway I thing, and suggested over in Ideas, that
the solution should just be a stupid blend of both things.
VI doesn't need more complicated mechanics in it right now. I am in favor of doing things the simplest way:
1 Civics are not earned by culture. The current concept bubbles are unlocked en masse by tech progress. Buy a concept bubble by spending a Great Politician. Great Politicians can be bought at any time with half the next GP cost for any type of great person except prophet. Now you have unlocked your concept bubble and the cards are available just exactly like the current system. So "Civics" is totally divorced from culture. (Obviously, initial Politicians should only cost about 20 of any gp type before the cost goes up to match regular GP x .5. Obviously, we should have some type of GP point generating civic available for free at the beginning of our chiefdom. Bla bla bla)
The nice thing is you can choose to ignore politicians and leave a lot of bubbles un-used, the next era's will still all unlock later. So the micro only comes after you invest in it, it is not free. That makes it more rewarding and not like "why don't you just give me these bonuses by default if they are so easy to get and swap."
2 Culture goes to policies. As a placeholder, even the BE free-for-all trees (no tech unlocks) can be put in at first. The good policies are geared toward global production bonuses, global amenity bonuses, and global percentages to this and that, to make them meaningful.