without having to get out my books, how do you know it was a multiple solar system destroying blast? in any event, the nega bomb was likely even MORE powerful (galaxy-class destruction iirc), and simon survived that. simon has been shown getting the better of thor, he's also ko'd thor with a single shot as well. in his energy form didn't his strength increase with rage or adrenelin? couldn't he shift his size as well? he's gone blow for blown with the hulk and has even beaten up the avengers!
as far as the black hole -- so no, the asteroid didn't get sucked in? did it have super strength to resist as well? 😄 and of course silverback was pulled in -- he couldn't fly.
i'm also curious -- when did vizh summon eternity? i have most of the gotg series, but don't really recall that. simon didn't do much to dormammu either -- galactic guardians did the only real damage, and of course krugarr.
so we have old simon: survives galaxy-level blast (though i believe he was ko'd and his powers were later mucked up), beating thor h2h, ko'ing thor with a shot, drawing against hulk, even doing damage to count nefaria AND having a very good showing against cosmic korvac.
hollywood: survives solar system level blast (?), beats cuchulain. the black hole thing makes no sense as a strength feat, imo . . . 😬
no evidence of a power-up, no mention of a power-up. simon's confidence was always a weakness. he overcame that problem apparently and improved his skill no doubt. i see no reason to think he was more powerful though.
as for mainframe --vihz could always interact with computers -- he was certainly better connected in gotg. more powerful though in his android form? why would he be? he seemed to have the same powers while they fought and increasing his connectivity wouldn't necessarily increase in personal power in a battle . . .
he could beat herc, but not the majority imo, and he wouldn't beat hulk the majority and certainly not thor. thor stops him almost everytime and of course reg ss kills him easily.