Lucas didn't do the clones justice by treating them as nothing more than CGI cannon fodder in the prequel trilogy. An entire other team had to create more (and better) stories to explore the obvious moral dilemma of creating clone soldiers enslaved to the Republic's MIC.
The reason that the "traitor!" guy was such a meme after the first movie was because it was one of the only parts that felt like something new was happening in Star Wars. Exploring Finn's conflict, ending with a heartfelt fight against one of his own brothers (who feels it's far too personal to end with a blaster) would have been a god-tier character arc, but Disney writes by committee and the results speak for themselves.