It’s ok for the pad to touch the rotor.

After thinking about this, before greasing the pins, use a Turkey baster or similar to remove the excess brake fluid. Being overfilled might cause brake drag and be the actual source of your brake issues. See what happens. Greasing the pins might not be necessary. The mechanic might have screwed up and overfilled the system when doing the brake job.

Don’t think that hole is an issue if it just a mounting bolt for the intake manifold. Just to be sure, start the engine and while it’s still cold check above the hole to see if you feel anything.

Before cleaning the MAF, check the condition of all your vacuum hoses. Deterioration, cracks etc. Also see if you can hear or feel any leaks. It’s your call about cleaning the MAF, personally I’d look at few other possibilities first. With age of your car, you might end up replacing all the vacuum hoses eventually anyway.



--
Will I buy another Volvo??? We'll see....