No, it does not favor PoW over PoS - both have the exact same value.

Orphaning a single PoS block with PoW is VERY HARD with the new rules (right now even more so).
Orphaning a single PoW block with PoS is IMPOSSIBLE with the new rules (right now you can orphan a SHITLOAD of PoW blocks effortlessly).

EDIT: to clarify - you can create an alternative fork with PoS block under the new rules (assuming that the second to last block was not PoS) - but that's not an issue. To actually orphan the legitimate block you'd have to also PoW mine at least one block after your PoS block.