Just a small idea I've been thinking about recently. I feel that by allowing the player to choose what size ring they use, they'll be allowed to affect the identity of their company more. TNA's six-sided ring, for example. It doesn't need to be a purely aesthetic feature, either. I know WMMA has a similar feature, letting the player pick between cages and rings, and I feel TEW could take advantage of something along the same lines.
Wrestlers going from one ring size to another generally have an adjustment period - WCW wrestlers going to the WWF had to adjust their spots due to the larger size of the WWF's ring. To reflect this I could see some sort of ring familiarity score handled the same way language is currently (unfamiliar -> somewhat familiar -> fully familiar). The more matches a worker has with a specific ring, the more familiar they become with it; maybe a higher basic score means they become familiar at a quicker rate. I don't see being familiar with a ring as causing any bonus to their in-ring performance but being unfamiliar causes a penalty. It's also something I would imagine people could turn on or off in their preferences.
Not a fully fleshed-out idea, and probably one debated before (my quick 5 minute search didn't turn up anything on the first three pages anyway), but I feel like it's not a bad concept.