You're giving them way too much credit.
They are profesional politicans. They lost.
Most of them don't care about RINOism. Most of them care about perserving their sorry political careers. If the power base is conservative, they will move conservative. To think that most are still deeply hunkered down trying to figure out how they can preserve RINOism, I don't think is reality.
I think that is your fear.
Regards.