I think it is some sort of deal, and we'd be daft to dismiss it altogether.
Whether you loved or hated LR, you have to accept that there is a time cost to changing manager, things do have to slow down a bit and as a result, we will be slightly further behind in our recruitment than we could've been, as well as these decisions on existing players.
If we find ourselves starting pre-season with none of the new signings here, then we have to accept that changing manager didn't help with that. Maybe some people think it's worth it to get rid of Rosenior, but I don't think you can pretend there's no downside.