We've had it on rotation on battlegrounds for a while, but while it didn't hold up in a public setting, Amere is decent in competitive.
Ruins Rebuilt suffers in my opinion from some design flaws. Especially the numerous places that are inaccessible to cavalry but can easily be exploited by any other class. If you watch the stream again, you will see more than once, that you can lure a cav into charging at you only to be stopped by an invisible wall, while the infantry/archer is slashing them without risk.
The balance between spawn locations are also a bit off. The upper spawn has the high ground and the most favorable archer positions, all of which are difficult to push. The lower spawn has the terrible archways on the right with very limited view of the battlefield. The left side is slightly better, but you only have that one main street that you can shoot along, which makes it so very difficult to set up a decent crossfire.
In my opinion there are definitely improvements to be found on this map.