I mean to be fair I feel like Asgore is more guilt-ridden in Undertale than he is in Undertale Yellow, which made him easier to deal with, but that's just me.
The most genius part of Flowey has always been his analogy for a videogame player. And Undertale Yellow bridges that analogy and expands it into fandom as well. In UT Yellow, Flowey changed Clover's story to see a different story. So... basically, Flowey made a fanfic. A fitting theme for a fangame.
The fact that in yellow it said how Clover heard someone calling for help, and Clover answered is amazing, to fit the fact that Frisk called for help in the future
The UTY pacifist Asgore fight was kind of disappointing to be honest, it would've been nice if we could have actually fought him and won instead of being forced to lose and get a rather lackluster ending