Let's not get carried away here. Dragic is a solid player but he's not an All-NBA guy. Rather, he's a third tier point guard (two tiers below superstar <Steph Curry, John Wall, Chris Paul> and one below all-star <Westbrook, Lillard, Lowry, Irving.>). Were I to list guys of comparable worth to him in the overall point guard hierarchy, he'd probably be lumped in with Mike Conley, Jeff Teague, present day Derrick Rose, present day Rajon Rondo, and ironically Eric Bledsoe. Excellent and above-average players but not quite stars (yet or anymore in some cases) that you'd build your team around.
However, in the current landscape of the NBA, most of those third tier guys get paid like they're first tier players, especially if, like Dragic desires, they hit the open market.
So really then, it comes down to the question of whether you see McLemore ever managing to reach a similar tier for his position (though given the state of the modern NBA shooting guard, that really isn't the accomplishment it once was) or even surpassing it. McLemore is young enough and has shown enough flashes and still has several years of team control at a reasonable price that it's not entirely out of the question that he could do it for the Sacramento Kings.
Does that mean that I balk at a Goran Dragic trade call that involves Ben McLemore? No. But I certainly have to think (whereas if it were a Nik for Noel trade, I agree to the move before the Sixers front office has a chance to reconsider).