It's tempting to overstate Eddies abilities because compared to us he's a mental giant. We're not even at Peak Human Intelligence and have zero savant abilities, so yeah, Eddie seems like an intellect god to us, And he is ... to us. But let's face it, we suck. So we're a very low bar.
In Eddie's defense, he hasn't been at it for very long. If we placed him in a different verse, we don't know how he might do. But based only upon his showings in the film, he can't hold a candle to Reed, Doom, Lex, Querl, the Doctor, the Master, and true Users of Supernatural-level Intelligence.
It would be interesting to pop Eddie into a different verse and see how he does. Maybe he'd up his game. But maybe not. In the movie. he was on NZT-48 for some time and he still forgot to pay back his loanshark. The loanshark had to go looking for Eddie. And that's after the loanshark told Eddie that if Eddie didn't pay him back, he would peel Eddie's skin off while Eddie was still alive. Really, I wouldn't even need NZT to remember to pay back a guy like that before he came looking for me....