The team is built for it, the coaching staff is not. They are already under the microscope if they lose a couple games due to 2 point conversions that might be the breaking point.
Anything over 50 percent is a plus, that's a really simplistic take. The percentages are going to be better against bad teams. If you can get over a 50 percent conversion each and every game sure go for it. You will be in tight games vs. good teams and naturally they will be more prepared.
5 touchdowns vs. Miami you convert four 2 point conversions. It raises your success rate but doesn't affect the game, it's a blow out.
3 touchdowns vs Pats. You only convert once and lose in a close game.
Your percentage is above 50 but it's hurting you.