We know from Sporcle-Man’s hint that Ms. Mimic has Super-Intelligence.
From Ms. Mimic’s hint, we learn that Flightpath now has Flaming Fists and Hotpunch has the Flight power.
According to Flightpath’s hint, The Refrigerator has Ice Breath.
Based on The Refrigerator, Hotpunch and Flightpath’s hints, we know that Metazoa is The Refrigerator’s girlfriend, and is in Column 3, Row 5. This means she has Telekinesis.
Metazoa lets us know that Bamf now has Super-Strength.
Based on Hotpunch’s hint, we know that everyone adjacent to Witchdoctor retained their powers. Since there are people who didn’t retain powers all over the seating plan, the only spot he could possibly be without being adjacent to a swapped power is the bottom left corner. According to Bamf’s hint, this means Monsieur Pain has retained his Weapons Mastery powers as well, as that ability is adjacent to Witchdoctor.
We also know from Witchdoctor’s hint that Botanisma now has Control Over Animals.
Botanisma tells us that Echo has Supersonic Screams.
We know from Witchdoctor’s hint that one other corner retained their power, and from Echo’s hint that the only two seats in column 4 that retained their powers are adjacent. Since the corner Mimickry is not adjacent to a retained power in that row, we know that Fourth Wall Awareness and its adjacent seat Electricity Manipulation must be retained. This means Super-Stretchiness was not retained. Since The Refrigerator tells us that only one person in Row 3 retained their power, we know that this retained power is Telepathy. Monsieur Pain tells us that Cognix was a telepath, so we know that Cognix has Telepathy.
Cognix tells us that X-Razor is in column 2 and did not retain his powers. This means he cannot have the Super-Speed ability, as this is adjacent to Witchdoctor and is therefore retained. This means X-Razor must have Invisibility.
X-Razor tells us that Haste has the Super-Speed ability, and we know that she has retained it as she is adjacent to Witchdoctor.
From Haste’s hint, we know that Dr. Strong is adjacent to only one hero who has retained their powers, and from Cognix’s hint we know that he is not in the same row as X-Razor. This eliminates Teleportation and Mimickry. We already know that Electricity Manipulation and Fourth Wall Awareness are retained, and since Haste’s hint tells us that Dr. Strong did not retain his power, these are eliminated as well. From Witchdoctor’s hint we know that Botanisma formerly had Control Over Plants, but since she no longer does, it cannot have been retained. It is also adjacent to two heroes who retained their powers, so it is eliminated. Therefore, by elimination Dr. Strong must have Super-Stretchiness, with Electricity Manipulation being the one adjacent retained power.
Dr. Strong lets us know that Elasticia is adjacent to X-Razor and has a new power, which means she must have Teleportation.
According to Elasticia, Zapbolt has retained his powers, and is in the same row as Psyche, who has not. The powers that remain in the same row are Electricity Manipulation and Control Over Plants. This means Zapbolt must have Electricity Manipulation (which we know is retained) and by elimination Psyche must have Control Over Plants, which is not.
Psyche tells us that Invisi-Lad has a new power. Since Fourth Wall Awareness is retained, Invisi-Lad must have Mimickry.
Invisi-Lad’s hint tells us that the final hero is named Pooldead.