So there are several things wrong here:
1. They can absolutely restructure Roquan. They could clear around $7.5M with a simple restructure, and they could do more by adding void years (which he currently has none. Basically just borrow from the '27 cap to pay for '26 if you want.
In fact, I'd be very surprised if he played this year on his current cap hit.
2. Marlon isn't playing this year on his cap hit either. He's either getting a paycut, or they'll again push $ into void years. I'm not sure they'll lower it significantly, but that's a foregone conclusion in my eyes.
3. Restructuring Lamar is certainly an option. The problem with that is, absent an extension, you can't guarantee he'll ever sign one. And if he doesn't, and opts to be a FA in '28, then there's no point in signing these vets or even trading for Crosby, because without a franchise QB on the roster, nobody gives a fuck what the rest of the team looks like.
I think they're going to do it today or tomorrow anyway, but his restructures are the only one's that actually have a material impact on the teams ability to do business short and long term. Absent an extension, the team should basically start planning for either '27 or '28 to be a "cap reset" year, i.e. a year where we do nothing, lose a bunch of games, and see what happens next.