I don't feel like I have as much power as I used to, at least in third. I still need to do my MAF calibration and tune refinement though. Hopefully I can find time to log this weekend.
Sorry to hear that man. How many revisions have you gone through till now if I may ask? For my K03 it took 3 revisions to perfection, but I was bone stock. For my K04 I'm currently at the 9th iteration, but I also got IC, DP, TOP, Pulley gradually in between my tunes and halfway through ended up having hesitations which is why it took longer. I also purchased a top up after my last mod. More mods will need more work.
Have you made sure your car is OK hardware wise? Not saying it's, not just trying to think what could be wrong. If you are on your e.g. third iteration, I wouldn't worry about it. I'm on my 9th like I said and have noticed improvements, albeit small sometimes, with each revision. It's just the nature of the game.
And yes, heat is a b****! I'm noticing differences between hot and cold days. On cold days though, you should be better overall vs APR. I've thought about the fact that we're rolling into summer many times... it's a bad time to judge your tune power wise vs a tune you had during winter time and that includes me. Just drive to Alaska.