The 49ers aren’t a good team, but Kyle Shanahan is one of the best playcallers in the NFL. The Buccaneers did what they not only had to do but should do - beat bad teams by more than one score.
The 49ers, for their part, utilize lots of heavy personnel packages, 12 and 13 (one running back and two or three tight ends) and such. This is mostly because they don’t have much talent at wide receiver. That’s one reason emerging star tight end George Kittle has quickly become a household name. But they like to throw off play-action out of these formations to help.