I was going trough the patch notes of 4.10, and among various things touched and fixed, last line informs us that:
Icebound has been smoothed out in various areas where tanks were flipping too often.
One of the worst maps in rotation, incredibly stupid physics on this map made it one of the most hated one in game. So if flipping is out, then map could actualy be useful, so I'd go a dn say that Icebound was buffed in 4.10 update. Can't wait to try it with Tippy.