Lemmon

A new format/setting (I'm tired of Wawanakwa)

The return of the aftermath (or something similar to it)

Blaineley

Contestants returning/joining the game mid-season (it added drama and made the season more dynamic)

Chef doing military stuff again (I loved that challenge in Tdi)

Censored swearing (it was so funny c'mon)

Different outfits/hairstyles for old characters that come back

...and then there's a brutal cut that leads to this scene where everyone randomly fights (this challenge isn't even present in this season)

It arrived too early: the new cast wasn't perceived very well (probably because Fresh Tv/CN didn't have faith in it in the first place), but it needed more development. So they forced the older characters to come back in order to maintain the show's popularity. All stars is basically roti 2 disguised as a crossover season, but the roti characters don't even get the chance to properly develop

The "All star" thing forces to include in the cast too many gen 1 characters that have already concluded their arcs and have no reason to be there again. To solve the problem the writers just exhume old plot lines or regress the characters, and this leads to a repetitive and boring season (the love triangle didn't need to continue, Lindsay didn't have to be that dumb, etc). At the same time, the roti cast had too little time to become iconic in its dedicated season, almost no character can be considered an actual all-star. So you have this unbalanced situation where it's difficult to choose which gen 1 should be included since there are too many popular characters, and on the other side, gen 2 doesn't have enough iconic character to include (to the general audience Ezekiel is 100% more memorable than Cameron, the roti winner)

The villains vs. heroes thing flattens the characters. It would've been cool seeing the contrast between this rigid subdivision imposed by the show and the actual complexity of the characters (they tried to do that with Gwen and Duncan when they didn't fell represented by the label the show gave them). But besides some bad executed exceptions, the characters actually behave as cartoon villains/heroes. The Villainous vultures don't get along and constantly try to trick others, not in a parodistic way (like in tdi when the characters would argue over the dumbest stuff, because reality shows are like this), but like they were a bunch of shitty mono dimensional villains from a cartoon for preschoolers. The Heroic hamsters are painfully good, they have no negative traits and are all friends like in a... cartoon for preschoolers (this whole good vs. bad made the season a cartoon for preschoolers)

This is something that really drives me crazy and I don't know if it's actually addressed that often. This show, before being a cartoon, is a REALITY SHOW. It's a parody, but it works like an actual reality, that's the point. This is the reason why everything you see in this show is something that CAN BE FILMED by an actual camera. So, that being said, why the hell can we see what happens in Mike's freaking mind?? It's not the first time we see imaginary stuff in this show (Owen's dreams are an example), but usually they were just non relevant short gags, not the whole focus of the season! But in general this season is not treated like a reality AT ALL, instead it's just that the good guys have to prevent the forces of evil from conquering the world (you don't see that happening in the Big brother, y'know?)