Combat Instincts is required but then never referenced or used or modified by the class. It doesn't feel like it's really a part of the class. Why is it needed?
I was struggling a bit with pre-reqs. The other option I thought for this slot would be to require 2+ or maybe 3+ Stand-alone tricks, which would relate with the abilities (particularly the level 1 and core abilities) rather better.
Drill: Feels a little weak compared to similar effects that grant a feat. Maybe allow it to grant a Forte as well?
It's not massively strong, but it is very versatile, since it's easier to get a broad range of proficiencies and stand-alone tricks than it is to get a broad range of feats of a specific type. Also you gain another proficiency/trick, so there's that as well.
Object lessons: Needs some clarification, when do I gain that damage bonus? what if the trick I use isn't an attack trick do I gain +2 on my next attack or is this only for attack tricks that deal damage?
Good point. Will have to mull over how to improve this a little; will also have to ensure the wording covers situations like any interaction with Master's Touch.
Do it like I showed you/Move like I showed you: Love it, I made something similar with my Guild Officer but I really like your solution as well.
Always learning: No issues here
Teaching style: I like this but the wording is a little clunky. I am not the person to tune it up though as people need to tune my wording all the time.
Glad you like them, will think about wording.
The wise teacher learns from their students: This is a fine ability but that is a cumbersome name. Maybe something like "Voice of Experience"
"Eyes in the back of your head"?
Pay attention!: This seems fine but maybe add group sense motive checks to round it out a little?
Maybe. I was also mulling over Master's Touch I or the Look Out! class feature (possibly with a boost) here.
No sloppy footwork allowed: hmmm, this feels like it is too much. 1 free trip attack per round when you're in a stance (as most opponents don't have stances) pick up polearms and use topple and gut (also gaining +2 damage) Maybe it's only when they make an attack against you or an adjacent ally?
Yeah, this particular ability was a little bit of an afterthought. I think limiting it to when you or an adjacent ally is missed in melee might be more appropriate (another way to emphasise the "sloppy").
Do it with me! This looks like the victim of some editing because it's giving you Coordinated attack and modifying coordinated attack but Do it like I showed you is already giving you CA.
I meant Coordinated Strike :S
Edits forthcoming, probably after the weekend.