I'd like to add my voice (Though it not really my voice) to this question. I was working on a mod that had a large map but the new limit messed it up. The new limit (50,000) is quite far down from the maximum in v0.80x and before (100,000). Although I don't think Armagan & co would of changed it purposely without a good reason for doing so (The native map size is much lower than the limit so I doubt it would of been changed with no reason), assuming it was a deliberate change.