LE opening

The two phrases I'd describe this episode with would be: Wow it's fucking nothing and They're dropping so much obnoxious spaghetti. Those two phrases I'd use to describe most of season 2 and season 5. If it isn't the unfunny obnoxious humour then it's the lack of substance.

Princess Luna and Halloween are my favourite things, especially the halloween part. So guess my reaction when both are written by Mike Vogel, executed in the same manner as John De Lancie's Discord/Q self-insert.

You took what was basically Celestia and reduced her to a yelling low-intelligent retard making an ass of herself. Luna was such an asshole this episode that she'd rival Pinkie Pie. You basically took The Batman and made him eat nachos.
As for the Halloween themed episode it might as well have happened in plain day light, because the plot was all about Luna yelling non-stop, dropping her spaghetti. There were no halloween-related elements to do with the plots, the background was just sitting there idly with no involvement in the actual story. Also Nightmare Moon is not a halloween prop.
I've seen better Halloween specials in comedy skits like Teen Titans GO and The Aquabats.