The truth is, even if the servers were packed, it wouldn't do much to save this shooter. Developer Bigbox VR has some interesting ideas though these are bogged down by mediocrity at every corner. You may be able to squeeze a few minutes of fun from Smashbox Arena, but beyond that it's an incredibly hard sell.
Smashbox Arena might be amusing for some multiplayer shenanigans, but it is very rare to find anyone online to play with given the niche base of VR (with PS Move sticks, no less). The story mode is very deceptive and is really just the multiplayer stages with AI enemies and partners, with no story at all. Even the announcer for the matches sounds like he is extremely bored and is about to yawn. There is a complete lack of appeal and energy, and the overall presentation just feels like it was made by an amateur programmer and not a designer at all. The lack of controller options really hurt this - not that they would make Smashbox Arena much better, since it is nigh empty of content.