I'm actually of this camp. I think taking away the soft cap has the potential to kill us in a few years. I am 100% certain this team is on the way up...under the old system, Its built very well to utilize the old system's rules. But if they change the rules on us, then all of a sudden we lose the edge we've spent 4 years acquiring. For a young team with guys on rookie contracts it almost means you can't sign anybody at all until your elite talents (Reke/Cousins) resign, because there is no way you risk losing them because of a hard cap.
I think the true hard cap is off the table. But even if it weren't, a hard cap doesn't necessarily mean you lose your young players.
What a hard cap would do over the next two years, before we have to worry about Evans and Cousins, is start a market correction. If they set a hard cap at $62 million, which is the owner-proposed figure, eight teams would have to make cuts in order to get under the cap (unless there's some grandfathering and/or exemptions*). All eight of those teams were in the playoffs last year, including both Finals participants. Dallas would have no shot at resigning Tyson Chandler. The Lakers would be broken up (their four best players are on the books for $68 million next year). The Heat would be severely restricted, and probably completely unable to make a run at a player like Dalembert.
Players like Antawn Jamison, Rip Hamilton, Gilbert Arenas, Chauncey Billups, etc. would likely be released, and have to resign and much more modest contracts. Mid level players making $5-8 million a year would also have to address their contracts one way or the other. The average contract length and value will have significantly decreased by the time we have to ink our guys. There will be new comps on the market. Derrick Rose and Russell Westbrook will be going a year before Evans. Blake Griffin goes a year before Cousins.
We do lose the edge we've been building, wherein we can take on salary now while we're under to cap, then go over the cap to keep our guys.
*One simple exemption they could make would be to allow teams to make whatever cuts they need to reduce their payroll to as low as 80% of the new cap, with no rights to resign those players. The money is still owed to the players, but is not counted against the cap. And if a team has to cut more than two players to get under the cap, they get compensatory draft picks at the end of the first round. This is a one-time provision, like a beefed-up amnesty clause.