So I wasn't able to be at the synchtube but I was at the first one so my thoughts are: It was a decent opening, definitely did a good job laying down the ground work, there was a lot of highly cheesey content I couldn't help but facepalm at, I questioned the logic of scaring them away with scary looking trees, Rarity was annoying from the beginning, I forgot how annoying Steven magnet was, also his new mustache sucked, I cannot see how he thought that unsymmetrical mess was lovely, Rarity clearly has no taste.
I found it odd that instead of Twi being shy or obsessed with studies she seemed adamantly obsessed with making sure she made no friends which just seems weird to me. Also I questioned the logic of the group calling themselves friends when that had barely been together long when they were about to enter the Everfree forest.
Seeing this again made me wish that we had gotten the show of "Seeking Elements of harmony, adventure, Fighting Evil, magical girls, etc, " but I still love what we did get with the whole slice of life thing.
Additionally you can see how much the animation quality has improved (Well at least you can J Teeth, during the last synchtube I couldn't convince anyone that I noticed it.).
I analyze "Geek Culture" here.
When All Else Fails, worry, that's the 14 way.