I disagree. You could just join one of the player servers that has survival already. Also, not many players played it and people didn't really like it. CubedCraft had a good reason to remove it, especially because there's like 2 million player servers with survival.
I totally agree with @erik6147 on this, especially when its very easy to make your own survival server.
All you need to do is get a world and maybe a few plugins and bingo. Survival made