The return of the Oscillation

[misterprofessionality]

Small update: the fluid level is normal, the lever doesn't seem to have excess play against the piston, but I did try an experiment by riding home from work today without using the front brake at all. When I parked I took my glove off and felt each disc, one was cool, one was hot. Not crazy hot but definitely hot. Of course, this is the one that's on the same side as the one brake pad that's more worn than all the others.

Conclusion: yea one of those calipers is dragging slightly at all times.