DMU public is extremely laggy because there is always so many people on the server. Since there isn't a private server for survival, it would be nice to have a peaceful survival server just for the betas. 

 just making you aware that servers cost money and the swdteam have 4 servers they have to keep up so another would be a pain to make (not answering just making you aware)

This isn't happening.

This is also not the reason the server is crashing. It's an issue with the mod itself that should be fixed in the next update. For now you'll just have to wait.

 I understand that, but you can still use plugins like Multiworld to create separate dimensions which can be used for survival. I know it can be difficult to add plugins to a modded server, but it can be done. 

 Yeah, I figured that, but nonetheless, having so many TARDISes can make a server quite laggy. Having a private survival for beta testers can give them more peace. 

 Oh well

 Yeah, it was just a suggestion. I'm sure it'll be figured out. You guys are really talented with this kind of stuff.