I think the best bet you have for a logging plugin is going to be Prism (Prism Official Thread - v3.0 Beta). It should function similarly to CoreProtect but is updated for Sponge.
As for protection plugins, you should consider looking at GriefPrevention (GriefPrevention Official Thread [1.10/1.11/1.12] TOWN/WECUI Support). It allows users to claim areas of land, similar to what you want. You can control how people claim land and who claims it, and the people who own land can control who builds, farms, etc. in the regions. I am not sure that you can have entering/leaving messages but it should cover everything else.
I have played on modded servers before Sponge and GriefPrevention was on them, which means that with Sponge it will work properly alongside the mods you have. As for Prism, I believe it is being rewritten and so it should have support. You can always ask the authors if they have mod support though.