That EU thing of "hey dudes, Sarlacc spat me back out on account of me shooting his tonsils" WILL become canon again, though, you know it. It'll either be in the stand alone Boba movie, or in some book or comic or something. A side effect of having that weak death scene is that it's exceptionally easy to reverse.
Look at the first scene this leaked script I found:
A long time ago in a galaxy far,
far away....
STAR WARS
EPISODE VEE EYE AND A HALF
BOBA FETT
The fearsome bounty hunter Boba Fett blah blah blah, he went out like a bitch...
Scene begins. Starry space sky drops down to the surface of Tattooine. We see the Sarlacc Pit, licking its dumb, unnecessary "feed me Seymour" mouth. The wreckage of Jabba's barge is still smoldering in the background. Suddenly, Sarlacc's head explodes, and Boba Fett comes flying out with his jet pack. He fires one more wrist rocket into the pit for good measure, then lands on the sand.
BOBA FETT, to nobody in particular: Oy, mate, I thawt they smellt bad on OUTSIDE!
He presses a few buttons on his wrist panel. Slave CAPITAL EYE drops out of orbit and lands next to him. Boba accidentally knocks his head on the door as he climbs aboard.
BOBA FETT: Welp mate, time to scrounge up some credits mate! Gday mate.
Slave CAPITAL EYE blasts off
...this is what's going to happen, so make your peace with it now.