Don't get me wrong from this post, I love MTA:VC and miss playing on it, and I would personally LOVE to see a new MTA:VC version be released... I'll just become the devil's advocate for now when presenting these views.
1. VC is a very old game
-"Old is Gold", as is the saying. However, due to the age and declining popularity of Vice City, the chances of a new MTA:VC get lower and lower.
2. Rival GTA:VC Multiplayer Mods
-Sure, VC:MP has been opposing MTA:VC for a very long time even way before the ASE shut down. However, with the recent release of the "Vicious Cocounut Organization" (lol) mod, there's another reason to say "why bother?" when it comes to the question of making a new MTA:VC.
The only thing that could possibly drive the MTA Team to come out with MTA:VC 0.6 is popular demand. But when you look at it, the demand may not be enough or it could be enough, but still not sufficient to persuade the MTA Team. Believing that MTA:VC 0.6 will still come out takes a great deal of faith. We're all thinking "MTA Team may not release MTA:VC 0.6" more and more often, I'm just saying it.