Who?
I agree, and that's part of the problem, honestly. Why bring back the main character's dead mother only to have her be the "B" story to a technobabble plot that didn't really make sense? The Visitor realised that the technobabble part of the story is just a framework on which to hang the character work, but Perpetual Infinity does it the other way around, and that cheapens the whole thing beyond the point of being worth doing, to me. You could have covered Leland bad, wants to steal the data and the suit, we might be able to save Burnmom and Georgiou is suspicious in about ten minutes tops. It probably would have actually made more sense without overdoing it so much. Then the rest of the runtime is about how Burnham breaks through her mother's defences to rekindle their relationship (or perhaps more daringly, fails to) after all this time and trauma on both sides, with all the usual Star Trek metaphors gushing around about absent parents, relationships damaged by trauma, substance abuse, and time apart, and an adopted child's questions about their past. It could have been beautiful. Instead it was pew pew and tech the tech, and then they tried to rush the emotional story in two conversations.