>>98118101Eugene has been handled extremely well, I'd say.
Fitzherbert PI showed him not just getting a job, but one that he was truly excellent at, establishing him as legitimately being the greatest thief in Corona and beyond, and it's a point that gets shown in other episodes as his arrogance is always balanced by his competence.
Return of Strongbow fleshed out his backstory and made him less arm candy to the princess. Same with the big brothers of corona.
In Like Flynn was an important episode focused on his relationship with the King, a relationship that was nurtured the whole season to the point that by the finale, the King entrusting Rapunzel to him feels absolutely earned.
Most importantly though, the show has been extremely diligent in showing his relationship with the Princess as being the healthiest, purest one in the series. They talk to each other and help each other through everything, and while Rapunzel makes him a better person, he in turn is there to support and trust her every step of the way, when the easy thing to do would be to turn him into the sleazy layabout he might come across at first glance.
