Hey TimeViking,

For the first video, as the previous comment, PB mainly teaches scalpel picking, which is not what you are doing, personally I highly recommend his technique. Loose thumb, he has many videos on that.

Spider exercises : keep going and try all the other kind of spider exercises he has.

Chromaticism : I think your finger position is pretty good you're playing with the tips of the fingers but I highly recommend this exercise with a metronome starting slow and then increasing the speed as you progress.

Keep going !