I think the only thing I didn't like about the opener was that it felt rushed. Something about the pace seemed off, like they were once again trying to cram a 90 minute story into 44 minutes.
Like that part where they first go to see the crystal ponies. it's just BAM, they're there talking to ponies. Up to that point, had I not seen the pre-release material, I'd have thoguht the city was abandoned or something.
But I liked it. I actually liked it better than any other season opener (Season 1's opener is to date my least favorite episodes, and Season 2 I felt was pretty bleh aside from Dischord....who was fucking awesome as a villain, but the plot was kinda bland.)
My Console Library:
PS5, Switch, XSX
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android