I'm assuming that the 2.0 version of Omnitron would just be playing versus him on Advanced, but this doesn't seem as if it'd really help him very much. I get that he's supposed to be a difficulty-1 villain, but so is Baron Blade, and I found him far harder to kill. Omnitron's Components blow up really easily in a 5-player game, very few of his effects scale with H, and his drones don't do much of anything unless a bunch of them come out at once, which is unlikely to happen unless he gets lucky with Terraforming. Adaptive Plating might severely impair a 3-character party, but is unlikely to be more than a nuisance to larger groups. Interpolation Beam is pathetic, and Technological Singularity highly situational. Of the one-shots other than possibly Terraforming (which is environment-dependent and thus only sometimes strong, although potentially very much so on those occasions), only Sedative Flechettes is really mean. It also Just Bugs Me that the Assault Drone and the Automaton Drone both hit the single hero with the highest HP, and the Railgun hits two such heroes; nothing ever hits the lowest hero for a surprise kill, and only the Flechettes damage everyone. I think one of those two Drones ought to have a different targeting parameter, not to make the game more challenging so much as to provide a little variety (granted lack of variety might have been deliberate for flavor reasons, since he is a robot...but a really well-programmed robot would target the hero with the lowest HP first, in order to remove distractions and isolate the surviving target before grinding him down into inevitability.)
I get the impression that if a few of Omni's numbers were tweaked, he could fairly easily be made a tougher nut to crack. Look at the picture of his Factory side...he's discharging 3 wasp-like Drones at once. What if, instead of reanimating one of his Devices or Components, he got H of them back out every single turn? Then he'd really feel like he was actually trying to wipe out humanity. What if the Component destruction point was "H times 2" instead of a flat 7? Slightly easier in a 3-hero game, but MUCH harder with 5, so he might actually be capable of keeping a Component in play for more than one turn? Alternatively, dealing 7 damage could destroy one component instead of all of them, so his Rampaging Robot turns could actually keep ahead of the hero's momentum, making him steadily more dangerous each turn, and drawing a Component on his Factory turns might actually worry the heroes a little. I also think that the Automaton Drone could stand to have its HP set to H+2 or even Hx2, making them very painful on the turn they first come out, though they still wouldn't last long. And from a flavor perspective, maybe Technological Singularity ought to damage all the heroes except the ones who lost Equipment; this would make everyone suffer, instead of crushing Bunker and Wraith while Tachyon just laughs and Hyperspeed Assaults the big bugbot.
The other thing about Omnitron that bugs me? He's the only Villain I know of whose death doesn't immediately end the game...except it usually does, because what are the odds you left a 4-5-HP Drone alive after destroying its 100-HP creator? Even the toughest of the Devices is only 15 HP, and that one is the mega-bomb that screams "KILL ME FIRST", so there's little chance you'll still have it to deal with after taking down Omnitron himself. All told, I think Omnitron deserves to have a MUCH more apocalyptic deck created for him, with Chairman's or Dawn's or even Matriarch's mechanics used to give him a properly Ultron/Skynet level of menace, and maybe dump his whole Trash into play when he's defeated, just to make sure you nearly always have a bit of mopping up to do even after he's defeated.