I actually don't mind that one particular scene much, and that comes from someone who really loathed The Last Jedi overall. Using the Force to propel oneself in zero gravity isn't bad, and the vacuum of space is not nearly as deadly in reality as science fiction often portrays it.

However, the one thing that did stick out as a glaring problem to me was the fact that the Raddus was fleeing the First Order's fleet at that moment, so its engines must have been firing at full thrust. So how is Leia and all that debris floating around motionless relative to the ship? Indeed, even if the ship wasn't actively thrusting, all that stuff was moving away from the Raddus pretty vigorously after the bridge blew open. Why did it stop? Is space actually an ocean?

Mine is "somehow Palpatine returned" and nullified the entire message of sacrifice and redemption from the original trilogy