This first batch betrayed all of my expectations, in a very good way.
So many references and jabs to the antics from original VN/games, it was really the pure definition of fanservice. Honestly, it has been a while I didn't laugh continuously for a good while.
My only "complain" is a bit too much Arcueid centred scenes for the Tsukihime crew (ironically, Saber got nearly the shaft for the Fate side), but it was really well worth the wait.
Oh yeah, Shiki and Shirou demonstrated how hellish it is to be a harem protag, especially Shiki being stuck between a rock and a hard place, when you look at his harem
Looking forwards to the second OVA batch.