I don't have the screenshots available right now, but gone are previous yields that might get a really good city going.  Basically, you'll never see a 4/4/2 tile anywhere on the map, because that's a tile Yield of 10 - they don't seem to exist anymore.

I generally only play temperate maps, so it's entirely possible that it has to do with just that map type, but having had a gander at the XML, that seems  unlikely.  Proceeding to try and mod in ridiculous amounts of yield (say, by changing the amount of essence a shard gives to a value 5-10x it's normal value) only resulted in the game giving strange tile yields like 4/0/5 (which shouldn't even be possible, according to ElementalDefs.xml)

Please... whatever is causing this issue is ruining a lot of the fun of finding great spots to plop down cities.  And I still have to ctrl+N a dozen times before somewhere useful pops up anyway.