I won't be the first person to say this, but I will be the first person to say this in this thread:
As much as I agree that it makes storytelling sense that Luke was with Yoda since the end of ESB, and that the "now I am a Jedi" and whatnot is well placed ahead of his assault on Jabba's palace...
I think it really wrecks Luke's introduction in the film. Unknown months have passed since we last saw Luke, and he was pretty messed up. Regarding the reveal that Vader is/was his father, the audience isn't quite sure if Luke will be the hero we need him to be, or the villain he could be.
When he shows up all in black and uses his Jedi powers to still the gamorreans and mind trick the twi'lek... well... I think we're supposed to be a little unsure of the guy.
Also, who's under the hood isn't revealed for a few moments either.
I also think that the Yoda scene is a nice 2nd act scene structurally, and it doesn't really fit at the very start of the film.
Obviously this noble quest you're all on will at best produce an alternate RotJ, so if the rest of you prefer to sacrifice the film logic for story logic, that's fine... but it probably won't be definitive to me.
At any rate... good luck!