DX has MKG projected as Gerald Wallace at best and Corey Brewer at worst. Either way, that's not a franchise player in most places.
Just because his "best case" comparison is Gerald Wallace doesnt mean he doesnt have the potential to be a far better player than Wallace was/ is. Those player comparisons are for just that- looking at the success/ failure players with similar talents and playing styles have had in the NBA. Go back and look at Kevin Love's profile from the same site- best case was David West, worst case was Sean May (lol). But I dont think anyone would claim Kevin Love isnt a franchise player. Russell Westbrooks best case was... Leandro Barbosa. Its not a perfect science.
As to the OP, relax. This draft is much deeper and more talented than last years, which wasnt too bad itself imo. Nearly every draft has multiple game changing players, and even if we dont land a franchise player this team has a boatload of needs- fill one and wait until next year. The bobcats arent making the playoffs next year even if they land the number 1 and Anthony Davis turns out to be the next David Robinson, any talented young players will help the rebuilding process.