FYI... this is going back to CAT 6 as part of the 2018 Category Changes.
And back to cat 4 post-merger fall 2018.
I was was able to get a five night September stay at 100,000 (fifth night free).
What has has changed so dramatically (if anything) at this property to warrant the 5>6>4 category changes in such a short period of time?
My last two trips, I stayed at the Ren Le Parc Trocadero and enjoyed it, but the Aug 2018 category increase there bumped me over to Ren La Defense given my points balance.