I didn't say Preki was our Sir Alex Ferguson, I said he helped in a small way to get us to where we are, meaning his result on our team was a net-positive as opposed to the OP who said that he had run our team into the ground.
I'm not defending everything Preki did, particularly with Uselessnov and AlphaSoup (which I never brought up). Personally, I didn't agree with letting the captains go, but it was more of a cost-effective move than anything else so I can understand the justification. At the time we had little salary cap space and Preki fixed that. I think the European cast-offs had salaries collectively of $500K, which is a lot of space.
And about those players, you're right, most are not with the team, but the players themselves are not what I meant by "net-positive", the consequential moves by Winter & Co. were the net positive. Mariner gets more credit for this than Preki, and rightfully so, but Preki got the assets here in the first place. If the club had been run into the ground, as - and I repeat - was the original point, there would be no tradeable assets.
Each player I mentioned was an asset - they were traded for something better.
Maicon Santos -> Eric Avila
Dan Gargan -> Dasan Robinson -> Kyle Davies
Nick LaBrocca -> Alan Gordon (+ Jacob Peterson) -> Ryan Johnson
Adrian Cann, Milos Kocic, Ty Harden are all still with the club. And while they're not great players, they are starters on our team right now for what its worth.
Point being, Mariner didn't have to "undo the havoc" of these players being on the team, he made the best of the situation. But without Preki, we wouldn't have had the assets in place to land Eric Avila, Ryan Johnson and Kyle Davies. Also, under his leadership, we won the 2010 NCC. To me, this is a net-positive for the team.