It is the exact same game in pretty much the exact same state that was free 4 or so years ago.
The only thing that they seem to have improved in any way is the UI.
All the outstanding issues, such as enemy bases spontaneously spawning behind you exist.
They just took what was version 1.1 alpha back then, added some buttons for facebook and whatnot, and slapped a pricetag after changing the versionnumber to 1.0 release.
The game disappeared off radar about 4 years ago, with no signs of updates or whatsoever after 1.23 hit (which changed next to nothing, by only adding a pointless arena mode, but took down the official servers). There were talks also of the university where they developed this game actually actively denying them the possibility to go on Steam, or offer the game away, but i can't find the archived version of that.
Here's proof of it being just that old, and being offered for free: https://web.archive.org/web/20090719201120/http://gar.eecs.ucf.edu/
As far as the procedural weapon generation, it's in its alpha state still, and nothing has changed for that. There are just a few different subtypes of weapons you can get, of which one in a hundred are plausibly usable. The hands down best weapon types for everything still are the starting weapons, or weapons with even tighter grouping of bullets than that.