I switched to bibs a month ago before my annual week-long ride in the Colorado mountains. Wow, had I know they were going to be that comfortable I would have switched years ago. They rock. The bathroom issues, even on all-day rides, aren't a big deal. Buy full-zip jerseys.
It's hotter than satan's jock where I live and the bibs aren't too hot for me, so I think that's a non-issue.
The only real negative I can come up with is price, but frankly comfort is worth it.