The shame is they can't play in front of sold out houses. LN is not the hottest venue but it can really get rocking like at the Nevada Las Vegas, Missouri, and Kansas games a few years back
I have no idea what any of the 4 seniors might do, but I think the odds are decent that at least one or two will return. But even if they all 4 leave, OU could still be pretty good. Think of it this way, other than Manek and Kuath, everyone who played yesterday will be back barring something unforeseen.
If Manek and Kuath do move on, OU must hit the transfer portal hard for some post players. And they'd have a lot to sell with the returning guards and all the good press OU is getting lately.