The undercard fights were quite good. Paul/Tyson was not a good fight. In the early rounds, Paul evaded, so as to not get knocked out. In the later rounds, Paul did not seem to want to put him away. 8 rounds is good for the sponsors, etc. Roy Jones started referring to Tyson's legs in the late 2nd round. I noticed his inability (or unwillingness) to move in the 3rd or so. Tyson had a clear limp later in the match. He was injured from before the match. As has been noted, Tyson threw harder punches during his training/sparring.
The stream delivery problems were extremely frustrating, as it made it difficult for non-boxing-watching folks to see a good fight, which each of the undercards were. The Taylor-Serrano fight was quality and very entertaining.
A couple of additional comments:
Ranallo, Perez, and Jones did not really seem to prepare for the fights, aside from watching highlights or reading a couple of twitter feeds. Ranallo was questioning whether Taylor continued to intentionally head-butt Serrano. More than once, Jones said, "She leads with her head and is left-handed, so this kind of thing happens when a left-hander fights a right-hander." Is she intentionally doing it? Not sure, but leading with her head is a tactic and her style. Then, Jones kept referring to Tyson adjusting his mouthpiece, to which Ranallo noted, "he's biting his glove. He's always done that."
2 hours in a room together preparing and they'd have been better.
I've heard interviews with Paul early in his career, and he comes across as a fairly humble - yet confident - person. These days, he's a caricature of a human and comes across as a real douche. That said, he has found his money machine.
Last, aside from the money, this was a no-win situation for Paul. Win by KO early and he beat the shit out of an old man. Win in 8 and he wore an old man down. Lose and he lost to an old man.