There will still be optimal groups of course. Det on hybrids does help some though. I would love to see more VW on the assist trains tbh. Early on (and by that I mean the first week or three) hard CC will still be great since most cant afford high det. After that however expect that the majority of tanks and hybrids both will have maxed det as some of the first RA progressions.
I still think slam on BMs, Thanes, and Mercs will go a long ways in 8man setups. You still have the main tanks for it also, but getting slam on those characters means giving up very little overall.