Well, you generally don't want your characters to be redundant though. A boy genius finding it hard to integrate with the crew (which was where it was heading, with the famous "shut up Wesley" being an example, or that Picard didn't want children on the bridge) is quite close to wondorous machine that doesn't fully understand what it means to be human finds it hard to integrate with the crew etc

I really liked him in Eureka. I don't think his acting skills have gone all that far downhill since then. And I'm not sure what sort of performance you expected from a superbeing Wesley.