Lol... I like MB, but she would have been better off not being used like this. I mean, even when Saru said to the Trill rep he'll be sending his medical officer and the symbiont to the surface (which was a good choice), Culber ends up asking MB to replace him (even though he listed 'life altering experiences' that he himself underwent as well - just because she spent a year more in the 32nd century though, doesn't make her the best to talk to 32nd century folk).
Culber also shifted to MB in this episode too.
Perhaps the problem lies with Culber. He is hardly immune to PTSD... and while he technically 'recovered' from his experiences... he was BARELY out of it by the time Disco jumped to the future... maybe the writers will touch on this at some point... but I think Nhan would have been better used to talk to dr. Attis.
MB could have been kept in the bg a bit more (at least on that front) and maybe even mention to the admiral the information she compiled in her year of being in the 32nd century about the Burn... perhaps SF had some more of those 'missing pieces' she mentioned.