I installed SFOS 2.0.2.51 base CM12.1 on Nexus 4 and aliendalvik has the same issues as in Nexus 5 with base CM12.1. Youtube does not work, video playback does not work, Google chrome does not work, google assistant does not work. But Camera does work! That's nice, but without video playback it's useless. Firefox crashes. It seems when it needs GPU acceleration it crashes.

So we are screwed if we change base for Nexus 4. We no longer will be able to use aliendalvik until it's rebase. I can't do that