Having Todd appear on screen is just embarrassing from the makers of the movie
They tried to have their cake and eat it too by having the actor, now overweight and I don't know how many years older, play the exact same character at the exact same period within the movie world. It worked reasonably well for Aaron Paul, because even though he was noticably older, at least he wasn't overweight.
Of course there's no excuse for the flash-flashback scenes in the diner with Walter and car with Jane. They did the same thing in the show in the last season, and it was just as awful. But at least you could just skip those scenes because they weren't integral to the plot like the Todd scenes.
Otherwise the movie was pretty decent, not necessary or anything special, but still an alright sendoff to Jesse. I think it would have been a lot better if it weren't tied to Breaking Bad though, but then they'd have to change quite a few things to make it work