I think:

UTG+1 has pp < TT
because he limped, called a raise and wasn't excited by the flop. Possibly KQ, KJ and he doesn't want to bet into the raiser and caller. This is less likely thought because while I don't know about 400NL but I fold these holdings to a PFR.

MP has overcards
because he raised preflop and I would consider this a continuation bet. I don't have much experience with laggs.

Button has overpair like JJ ot TT, he should have raised on the flop but hes a calling station so he didn't.

I play micros by the way.