Part of the "heims" discussion seems based on people who are trying to play them the same. Its part of the problem with many of these discussions.
A "tank commander" style of player will love Ulm, maybe Jotunheim, and Abyssia, possibly Pythium. And they will hate nations like Pangaea and Caelum. They will declare some nations to be broken or vastly in need of more armored troops.
A "researcher" would hate Ulm and love Arcos. A Stealth player would hate Arcos. Personally I play alot of "stealth" or "defensive". Usually I would do alot more breakdown of the styles but today isnt a prime day for me but I think the point is still valid. If you arent playing a nation in a way to make the best uses of what it HAS then you cant declare it broke.
You can only declare that it doesnt play like your favorite nation.
IMHO