I’m mostly thinking of the dance number and the way the theatrical version cuts the final act split between Erin and Abby, which guts their respective arcs. I’ve only seen the theatrical once, so I couldn’t name what jokes it omitted. But there’s a good chance I’d agree with you, since there are a number of gags I wouldn’t miss. Mostly the “Kevin’s so dumb” bits, which don’t work for me.