After playing a good number of games with the latest RoM 2.2 I think I can now point out some points that I find annoying.
1 - In about 10 games I was able to build glass smiths only in one game after colonizing the new world on a standard terra map.
I'm in total agreement with this, it being one of my two primary gripes about gameplay. Seems to me that stone and marble in the vanilla game are sort of tweener resources; they are great for building a handful of wonders speedily, otherwise a waste of time. In RoM, however, marble is still relatively useless (haven't counted, but it's actually used in what, maybe 10 buildings?), but stone has now become
very useful because of the glass-making line, paved roads, etc., while the new salt is worthy of being considered a strategic resource. Far, far too many buildings and bonuses rely on salt now for it to be so rare.
(Also, historically speaking, valuable does not equal rare! Salt, though very important to the development of civilization, is not exactly rare: it is available in every area of every continent on our planet. And this isn't a new discovery... the oldest documented mines on every continent are for guess what... salt! Every major and minor civilization (from those considered most to least advanced) throughout recorded history has had access to salt.)
Ok, gameplay gripe #2: I suppose this might have to to with the dreaded balance and era question, but I find it slightly irritating that I have to hunt (i.e., restart the game ~10 times) to find a good starting location. Not prime, mind you, but just decent enough that I can actually survive on noble or prince through Industrial. You get zerged by barbarians and any aggressive AIs within stone-throwing distance, animals on steroids pick off your scouts and even warriors on walkabout, you get all sorts of weird foreign religions popping up in your pretty new colonies, and then you realize by about 500AD that there is no copper, salt, stone, iron, or horses (or elephants if I play Siam) within 2,500 miles, usually with an ocean or two and the bloody Aztec (they always hate me, no matter who I play) in the way.
Just saying.
Other than that, its brilliant! But seriously, some sort of AI refining needs to occur in conjunction with balancing of resource allocation in some way (especially since there are so many reasons for AIs to
not trade you any necessary resources).