On the note that Xavia's has no effort put into it, that might be true, but it does have some nice stuff.
The fact that you can pick up dropped weapons, especially when they die, is just awesome. Sure, it'd be way cool if you wouldn't be allowed to drop them in the spawn because they can just save and cheat.
The vehicles throw a nice twist, which is minor.
Finally, the day and night system was a bit annoying at first until I found the nightvision goggles in the shop, which really add to the fun.
The sentries are a lot of fun too.