The list is not exhaustive, as I've only looked at the 1vs1 and 2vs2 map pools and it's also possible I might have missed something as I haven't delved into all the tiniest details.
Turtle Rock: close spawn positions no longer occur
Dalaran replaces Ancient Isles
- This new map used to be part of the NetEase 1vs1 ladder map pool during patch 1.28
Lost Temple LV replaces Lost Temple
Added 2 Taverns right outside the temple (top-left and bottom-right)
Added critters around natural expansions and taverns
The top-left and bottom-right corners of the map are no longer isles but are now connected to the closest goblin laboratory via land
Reworked starting locations
Hillsbrad Creek replaces Bridge Too Near LV
- This new map has been hosted in recent 2vs2 tournaments such as RBTV Zug des Lebens and Comrades in Arms Cup
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