The big issue is that Jackson was limited both by inexperience (or lack of skill, but I'm not going to kill a rookie in a wild card game) and by the Ravens offense. Like Flacco as a rookie before him, the Ravens protected Jackson by effectively calling an offense in which he wasn't allowed to take downfield shots or throw across the field, so the Chargers could stuff the box. They also have a defensive line that can hold up against the run without a need for run blitzes, and Derwin James is an animal in space.
They won't have the same leeway against the Patriots. Brady will force their defensive backs to back off. In the end, though, the offensive line is still going to have to win individual battles, especially our tackles versus their defensive ends. But I suspect this sets up as a big Sony, White, Gronk, and Patterson game, with a number of four verts throws to Edelman, Hogan, and Dorsett to keep them honest. Fans are going to wonder why they're taking downfield shots early (especially if they miss on them, which is more than likely the outcome) and the answer is to set up the run.
This Chargers defense is weirdly reminiscent of those mid-2000s Colts defenses with Mathis, Freeney, and Sanders as the superstar standouts. This team has better boundary corners but it's not that different.
The offenses that have done well against the Chargers, by the way, are those that involve their running backs in the passing game. James can shut down a tight end or a back or a slot receiver but not all three, and Addae is a liability in coverage.