Powedermonkey,
It can feel a bit like that. My advice is don't develop subjective notions of what you think you know/don't know, just do the progress tests and if you get 75%+ then move on. Just make sure you have enough time to run through everything again before the brush-up course.
Fear not, the brush-up course will knock you into shape
I know that when all is said and done, these exams will NOT make me the pilot
Am I the only one in the world who thinks amongst the dross of the ATPLS, is plenty of essential knowledge?