From what I noticed the Servants power nearly tripled, but there defense halved, the Geroppa (sp?) has at least doubled in size, the running track thing has been added onto Triora (I fukken love this thing for some reason, probably just because I transport all my Nekomata-chan down there and have lulz.) Most things (elites and landmines/bombs/items) can kill a master in one hit.
It's not intended to be permanent, but I like it.
EDIT
actually it's on all Triora.