College football halftimes are 8-10 minutes longer than your NFL halftime. Hence, it drags out the length of the game overall and means fans are trapped at the stadium longer. Most fans don't want to give up an entire Saturday going to a football game. If they can reduce the time of the game, time at halftime, and get the game down to around 3 hours or even just under, the better.
The new rules are a HUGE step into improving the length of games. College football has been unbearable with the length of games, constant reviews, clock stopping on 1st down, ...games lasted forever. The rolling clock is a BIG first step. But there are a few other tweaks they need to make to take the next step.
-Revamp the Instant Replay. Don't let the refs use it as a crutch. Each coach gets 2 challenges, once they use them (even if they are right)...that's it
-Review all "targeting" after the game, if there is a found targeting, player is penalized for the NEXT game
-Shorten halftime to 12 minutes, bands will have to adjust
-Cutting TV commercials is unrealistic because of the money ESPN/FOX pay for the games, but if you can take it from 3:10 to say 2:45 that isn't an unreasonable ask