While the TV series was a letdown, the OVA did a good job of bringing the service back one last time before this series rides off into the sunset.
From the OP:
From the OVA:
The sauna scene lasted over 2 minutes, putting it on par with many other great nude scenes from the previous series.
As far as a compilation goes. I would say it is very likely to happen, though there’s a lot of other projects that will come first.