I know this attitude goes against Aggie custom and tradition, but if you aren't evolving then you are slowly dying. So much of what the Yell Leaders do was designed to work in the 1920s when they were the only thing happening at a game besides the game. The things they do were designed to work before every student at the game has a cell phone distraction, HD TVs, and streaming Yell Practices. If they aren't careful they might find themselves being replaced by a DJ and fighting to justify their existence because of tradition.
For example when I was in the Aggie Band we only ever played full songs except for Wildcat. We also would refuse to travel if we couldn't march. I remember the university threatening to send Hullabaloo band to play at away games if we didn't. Somewhere after I left the band evolved to now play small snippets of popular songs in shorter breaks. They also will send a ~100 piece non marching travel band to every game.
Keep what matters and is important and evolve what isn't working.
A few random ideas that I haven't put a ton of thought into:
Hire real joke writers for Yell Practice. Tell a few real funny jokes about the other team, then you can tell a traditional corny Ol Rock story. The same tired jokes they tell don't work in a world of You Tube.
Simplify everything: Ditch the weird poses when you pace back and forth. You can still pace if you want for some tradition. Trim down the Yell motions to what is necessary. Looks weird in HD
Ditch the painted overalls. Something that doesn't work in HD.
Put a Yell Leader in the DJ booth.
Double the amount of Yell Leaders. The stadium expanded and they should have too. We should have Yell Leaders in front of both end zones and the alumni side. Yes even if that means having some Non-Regs and women.
Yells take too long. Pass back, hump it, count off before a Yell takes too long in the modern game with a ton of ads. Therefore they don't do many in a game. Save traditional yells for pre game, quarter breaks, etc. instead figure out musical cues for the Yell Leader DJ that leads a shorter yell. Something like [musical cue] " Farmers Fight!" or [musical cue] " Gig 'em Aggies!". No passback, no count off, just call and response for the DJ and the students.