Quoting pigeonpigeon
"won't be content until I can play on any sized map and still have some choice into how to start. Can specialize on large maps, can Econ small maps"
See, I don't see this happening. And the reason is ... is that at that point its just "common sense." The real plague of some must builds is if its too specific, cheesy, and always wins in ANY situation. Econ strats working on large maps, and specialized starts working on small maps ... to me is an indication that the system WORKS.
One thing where I might agree with you, however, is that Large(ish) and Small(ish) empires should be equally viable on any mapsize ... of course how big a Small(ish) empire is probably has a lot to do with "relative to map size."
So on a small map, 1 might be small and 5 might be big, while on a large map 5 cities might be small and 20+ cities might be big. (and I don't mean ALL cities, but just settlements in general)
TO REITERATE: a "trend" of having to get "some" civic techs before getting other things is perfectly acceptable.
What is NOT acceptable is having to research A, and then B, and then C, and then D, and then E ... or else you are hopelessly lost, and it has to be in that exact order ... and then you have to follow a perfect build strategy, combined with the immediate switch to teching X, Y, and Z implementing expansions 1, 2, and 3 in that order ... etc etc etc.
See, HAVING to do a very specific set of things to be viable is bad, as its cheesy and non-intuitive. However, needing SOMEWHAT of an economy before doing other things is LOGICAL and therefore acceptable.
If EVERY mapsize beelining Schools was the key to victory, that would be lame ... however consider being attacked, either by players or by bandits. If you don't have any means of fighting them off, then your school beeline wasn't optimal.
I think the key here is to not make ANY ONE thing optimal ... and even if SCHOOLS end up being the single required beeline in the game, its agreeably quite silly ... however its better than having Magic completely dominate Warfare and Adventuring, thereby being the only possible specialization choice (or vice versa for Warfare or Adventuring).
I mean, knowing what works for each strategy is just part of learning to play ... but having one strategy as the only winner is lame (cough Chalid and Firebows, cough cough)