Bob's been part time for years now...he's 70 for Christ's sake! He's earned it. Now, I agree, the staff they DO have on full time should be doing more in the offseason, but Bob, for his age, is pretty active on social media. He almost always has something posted on Twitter when there's a Bombers announcement of some kind.
Having said that, when the season begins again, there's nobody better (Tait, maybe) than Bob for knowledge of the team and the league....the dude just gets it. Way better than anyone else in radio/TV/print...