Wow, some people are really overly critical of this episode just cause of some potty-humour. xD
I do agree that the humour was from the juvenile end in this episode, especially at the start. And no, I'm not a fan of it, either. But I thought the story was actually a pretty good one, and different from the usual hyena stuff. We got to see new characters as well as more of Simba. Seeing a new location with snow in The Lion King universe is nice, and the characters were cute playing in it during the song (Fuli, especially

). I found the background music in this episode especially nice. And it's also good to see the animation slowly improving. I think this episode had the best animation so far. The fighting scene between Kion and the hog is a good example. Not to mention we actually saw a proper punch thrown!

I hope they keep improving in the same direction.
In my opinion, not a bad episode at all. The humour was definitely the weakest part, but once you get past that, it's still an overall fun one.
As far as the snowball surviving, it's evening by the time they get back home, so it's probably a slightly colder temperature. So if they got back home fast enough, there's still a chance the snowball might've at least partially survived. And it's just a silly gag in a cartoon, so who cares whether it's completely realistic or not, anyway. xD