Well, I'm going to get sacked for this, but I still find FOP not bad, in terms of what it can do. There really seems to be a limited scope of characters and places now, but mostly blame it on the newer writers. They're the ones who pick the characters (and make this The Mr. Crocker Show).
Of course we did have the amazing trilogy with our favorite boy genius, so I'll leave it at that. Back on topic, I'm not sure how this crossover with The Loud House would work, but I wouldn't mind it as a little short of a few minutes (not an actual episode by any means).
Really, this was also a sort of promo for the week of premieres both shows had at the same time in September. The Fairly OddParents was supposed to go on for another week (like The Loud House), but it was dropped at the last minute and put on hold for later.