Hopper for Lever? I wouldn't have thought that would be enough. Hopper has played 20 games in 2 years at GWS as a midfielder.
Lever has played 53 games at Adelaide in 3 years. Other than a single SANFL game at the start of this year when returning from a hamstring injury, he's been in the best 22 for 2 years now and made the AA squad this year.
Lever has also supposedly getting offers of $800k+/year, which I'm guessing is significantly higher than what Hopper has been offered.
Hopper looks like he'll be a very good player but, judging by the offers in front of him, Lever seems to be regarded as someone who will be elite in the next couple of years.