I didn't realize they already released a 35/1.4 P that's a couple hundred grams less and looks significantly shorter than their mark II. Anyone using that? It's on sale for $599 at B&H right now...
If you read the Sony Alpha blog they compare it to the coming Viltrox 35/1.8 - which hasn't been released yet - and which gets much better reviews across the board (by them). That being said, looks likely the VIltrox will be bigger and more expensive.