I think any player that can claim two majors including double-digit career wins is well above "middle of the pack" imo, especially in this day and age.
Since Tiger relinquished his dominance in the sport back in 2009, only 5 players have managed multiple major wins, and only two of them have won more majors than Bubba (Rory and Spieth) during that period. Mickelson and Kaymer have both won 2 majors during that time as well.
Then we look at this particular group and see how many non-major victories they've had during this same time:
Mickelson - 3
Rory - 9
Kaymer - 1
Spieth - 8
Bubba - 8
Seems to me that he's in pretty good company and holding his own.
But again, JMO...