1 hour ago, Magnus Grendel said:To be fair, it's not like borderline magical healing tech is new to the universe....
...True enough, Bacta has been a thing since Empire.
...however...
... Luke's experience s with Bacta in Empire were basically recovering from a bear mauling and frostbite, and he also endured life and perspective changing injuries with the cybernetic hand.
Basically, Bacta (rapidly) sped up his recovery process, but it didn't do everything.
Finn, on the other hand - suffered what should have been a life altering injury in The Force Awakens - a more brutal hit than Luke ever receives...
...and, barring a Bacta suit scene that was played entirely for comedy, it was never mentioned again. He doesn't struggle to deal with the effects - physical or mental - of what hapoened.
Finn went toe to toe with Kylo in the first film. He was being presented as someone who could potentially become a key player. In the last jedi, he regresses, and that only continues into the finale.
His arc may as well have ended on Starkiller.