I don't understand the reasoning for making Pinnacle level so much higher than Diamond Plus as far as the points needed, and then not offering perks that are more meaningful. Diamond Plus is 175 points. Pinnacle Club is 700. It's such a gap.
For those who don't know it, the plan is that once all the RCI ships have a Diamond Club fully operational the Concierge Lounge will be only for those in upper level suites and Pinnacle Club members. Diamond Plus members will have to use the Diamond Lounge (unless of course they are in a GS or higher category).