From what I understand, Mineplex's Bedrock server has a survival gamemode. Taking this into consideration, I don't see why Java players shouldn't have access to a survival server too! Survival is the main aspect of Minecraft and I enjoy it very much along with a lot of other people. Furthermore, I don't know much about coding at all but I don't think a vanilla survival server would be that hard to implement seeing as most of the work is already done for you, for lack of a better way to put it. EDIT: To solve the problem of people playing on different versions of Minecraft, the survival server could be locked on the latest version of Minecraft. This would only be a slight inconvenience and it would be worth it in the end.