I think this is good news. Mangino is not the sole problem, but he hasn't done anything good here either.
I also think this means we look like a power football running team with Lanning at the QB going forward, vs sideways passes and trying to do a spread passing offense with SR. That's what I get from reading between the lines.
It is hard to get all the players together to tell them the news in a way that doesn't let it leak to the media. This decision was probably made late yesterday or this morning. With the exception of calling a team meeting before the presser (which would conflict with classes, other schedules, etc) it would be difficult to do. IDK if you can really blame Rhoads for that.
Overall I like this move.