Jonathan Bernstein captures why I'm relaxed about Trump appointees: the confirmation hearings fulfill other functions than approving/disapproving. The only thing worrisome is whether all the ethics paperwork will be filed before Senate approval. The Senate should not approve before seeing all the paperwork.
My attitude is generally: "enough rope", as in give him enough rope to hang himself. I remember the results of Reagan's appointments: Interior, EPA, and State all self-destructed, and OMB didn't go so well either.