Being a small market team, you cannot let very talented players like Evans walk. You sign them at all costs. Whether it be to play them or to trade them. We won't be able to bring in a player with Evans' potential in free agency. With the continued development of our youngsters (mainly Cousins), it's likely we won't be drafting high enough to net us a player with the skill and potential of Evans. So in my eyes, the only chance we got at winning a championship is signing Evans and letting him develop, signing Evans and trading him for a player who has star potential, or letting Evans walk and trading Cousins for scraps in order to assure us we will be picking high enough to net us multiple stars in future drafts.
The last thing I want to do is start over because I think Cousins can be the best big man in the league, and that is a recipe for going far in the NBA, but we need at least another star next to him. Even Lebron James, arguably the best player to pick up a basketball, couldn't win a title without another star next to him. I don't want to bank on Cousins being able to do it by himself. We need Evans either as a player or trade bait. If he gets offered 13 mil a year and you think that is too much for him, you match it and look to move him for another star who you would be willing to pay that much money for. It would be a mistake to let a potential star walk away for nothing. I think in the end it will set us back further than you think. I see it as a move that will convert our team from possibly a title contender to mediocrity for years and years.
Another point I want to make is this argument surrounded around "if they think Evans is a SG, he's gone" argument. As high as the FO is on McLemore, he is just a rookie (and a young rookie at that). There is no guarantee he will pan out. I would say the probability of him busting isn't too high, but it's crazy to think that McLemore is the reason why our FO will not resign Evans. How stupid would it look if McLemore turns out to be just an average SG? We let Evans walk because we thought he couldn't play PG next to McLemore, but it turns out McLemore isn't what we hoped and that we wish we had Evans back at SG.
My honest opinion, we should have McLemore come off the bench to start. This guy was in high school just over a year ago. Ease him into it. Let's see if he has what it takes. If he doesn't show well, thank God we resigned Evans! If McLemore shows well, go ahead and try Evans at PG next to him. If that works, great! If it doesn't, then you look to move one of them in a trade where you can get a player back who has similar value.