ok, so here is my dilema. My sensei is going through a rough split with his girlfriend of 9 years. He has, on a few occasions, shown up to class "slightly intoxicated".
So basically he's going through a divorce.
Nine years is a long time.
He's drinking too early in the day, obviously.
Go get a bigger boy (oh alright, senior student) to tell him clearly to only drink AFTER class.
And about this 'changing technique' business : maybe not a drawback at all, if he's got something good it can be a sign of fickle genius and deep insight ... or not. I imagine the same could have happened with Ueshiba if he's been keen on the booze ... but apparently he wasn't.