They explicitly stated BLU can't make use of any matchmaking but it can enter duties as a preformed party. They made a comment about how it wouldn't be fun to take a BLU with Lv 5 death into alphascape and having an instant win so there's an implication it won't be able to raid. There's also the lv 50 cap which may prevent it from being able to go into an end game raid for now.

My suspicion is that a premade could do something like Coils with Blu though. Maybe unsync HW trials/raids too.