Sam's presence and the sense of unease he brings cannot be replicated.
I was initially super pro-bam because he is capable of doing this. He is extremely capable of being chaotic and pulling off mean-spirited pranks, gaslights, and just fucking with people for the hell of it. He's also big and intimidating now that he's not an emo twink or a fucked up bloated alcoholic.
Aside from some slapstick with Landon, he hasn't really done anything though. He just pulls up, hangs out and talks to people, and bails. Although I also don't really mind friendtank and it fits in well with this season's "brainrot content house" theme. Fishtank doesn't really need to be a 24/7 Hell House and the tension in the final week is going to be insane. I don't particularly want Drake, Bashir, Twins, or Landon to go.
What it does need though, is someone who can keep the fish on their toes so they don't just revert to Pure Friendtank where nobody fucks with one another and everything is just wholesome hangouts and challenges. They should at least be trying to antagonize people they want to see eliminated - Emma didn't get nearly enough of this and basically just hung out the whole time. From the POV of a fish, these people are standing inbetween you and 50k - the vibes should be somewhat bad.
Stuff like some of the more negative fishtoys helps with this(forced date, tied together, silence cone, mandatory cigs) but all are absent this season. Introducing these would help a lot with intra-fish drama and beefs. There's also no beef bell, no doghouse, no punishments or benefits for fucking with anyone. Ever since JD left, it's been either pure chaos or friendtank.
Sam being there would unironically help with that. He's better at manipulating people and instilling a sense of unease than Jet or Ben - neither really command respect the way he does. I could care less about Frank but him being there would also help with that, especially if he wasn't in pure "destroy everyone's shit and make them crash out" mode. They really just need someone who's there to make the vibes
slightly worse and more serious without totally nuking them.