That is awesome, passing is one of the hardest parts of the game, to this day it's what I struggle with the most in matches, drill drill drill it, and right when you start feeling really comfortable with it.... Keenan will come up with something new everyone will do LOL.
Truth is, the basic concepts have always worked... Keep good posture and base, pass over or under your opponents legs, break their grips and clear your hips..... everything else you'll figure as you go
This is what i have come to realise too.
When i watch high level BJJ a lot of the passes i see are the ones we learn from day one. It's just the efficiency and timing on these techniques are different.
I guess i need to start chaining up my passes now, you rarely ever pass someone good on the first attempt, rather you might catch him on your 4th or 5th try.