In the 07/08 season, I used to call him the 'Torres of the reserves'. Not because they're similar players or have a comparable style - they're actually very different - but because of the effect he had on the team. The reserves side that won the league that year was very solid but painfully uninspiring and lacked any real cutting edge up front. Nemeth changed that for them and had a great half a season or so (or was it more?) giving them someone to build their attacks around, someone who could score goals out of nothing and so forth.
Pacheco has always had that air of quality and promise about him, which I guess is why some (like that bellend Roger for example) have always identified him as *the* talent in the reserves, but as the doc said, Nemeth at the time was far more polished and promotable.
Since then, he's suffered two years spoilt by injury. Before going out on loan, he had a crap year in the reserves where he struggled to find his form after returning from injury. And without really having followed his time at Athens, I'm led to believe the same sort of thing has happened this season. So with that in mind, it's hard to judge where he's at now in relation to his actual potential or perhaps more to the point, the potential he showed two years ago.
I agree to some extent with Whitey though in terms of his physical attributes - he's not particularly strong or fast, relying instead on technical ability and game intelligence. The problem with that is that it'd be a waste to play him out wide and he couldn't lead the line on his own, which only really leaves two up top - which we don't really play. He's not really suited to Gerrard's role because I imagine he doesn't work hard enough for Rafa, so I don't see how he's going to get games.
On top of that, you could argue that Pacheco is now where he was at two years ago, so who would we better off investing our time in? We're not going to be able to accommodate them both.