I wasn't talking about the suit's defensive ability, but the ability to reshape things it touches.

And, well, everything Vordak said. Even if you don't count kinetic energy as energy and thus don't have it absorbed by the suit (which i assume is the case), how many characters are there at that level that use purely physical attacks? Anyone without powerful physical attacks would be fighting a loss-loss situation against him. His physical defence, in turn, may or may not be overpowered, it's hard to tell. You use kevlar and diamond as examples, but even in real life there are substances vastly more capable of stopping such attacks. Let alone in a scifi world, who knows what kind of compounds the suit has already absorbed and can conjure up to block attacks.

Which brings up the problem of absorbing new compounds. If he ever touches Wolverine's claws, will he learn to transform his suit into adamantium, making him nigh invulnerable? Wolverine isn't in this arena, but you get the point. He's probably gonna get exposed to a lot of fantastical substances, so the ability to absorb them is gonna make his power level skyrocket sooner or later.