I haven't had enough time to test XMM 8xxx but here are some notes and things I am missing. I'll make different posts, by theme.
Why cant't I run 7 + 8 at the same time?
Why does 8 take forever to load? Almost 35'' on an i5-2500 @3300 with 16Ram + SSD. Is this normal? Nothing takes this long! (My DB is ~90MB, ~6000 entries; I always take one poster, 12 actors and No "complete actors".)
I guess the .Net platform reached its limits? Have you considered moving on to a more suitable one?