That sounds about right from what I have come across. Bowser won't get you beat playing OLB in a 3-4, but he isn't going to win you anything either. Not sure how much of an upgrade he would really be over Jarvis Jones. Like Jones, the things he does best are coverage and defending the run - not rushing the passer.
But I agree with you, what do I know? I just read and watch a few things on the internet a handful of weeks each year!