Well, I do think the team have taken too much time to create it tbh. I know, and respect, that they are a small team, and not on a fulltime job towards this mod, but as for the popularity, it took too long.
Also, we hardly hear anything from the big bosses around Renegade X. Of course there are no 'hard' updates, but atleast keep your visitors satisfied by updating things or share facts I don't know.
As for the SP, I think it was a good way to let your targetgroup 'feel' the way of the new Renegade X gameplay, but honestly, I think most of us would be more appreciated that all that effort was put into the MP...
The thing is, people are used to wait for a game approximately one to two years. Because in this case, it is a mod from sketch, people do respect the time you need and would wait like 3 years, or 4 at max. I know you first created the mod within a respectable time, and from there started to 'rebuild' it. But as for your players, it takes ages since the first announcement, and most of people lost interest...
I really HOPE you guys will bring us GOOD news ASAP