It was a bad decision in my opinion, but to be honest they did it in a beautiful way, I liked how they executed it and it was a great episode overall.
Vinny is a good dog and seems like a nice character, sure he's not better than Brian or too likeable imo but eh. Some people bitched about Twi becoming an alicorn and most of you defended it immediately saying the show will still survive.
I think it'll die out without the family dog.
He was the intellectual voice of reason and he will be missed.
One question though, why not Chris? Also he's a kid he had pretty much no purpose in the show and would be an easy character to kill off. People are saying Meg btu why? She's probably the toughest and most complex character in the show.
This decision wasn't good but hey it happened and we have to deal with it.
R.I.P Brian <3