The new GM is Jan Goessing, who was most recently at the MO Washington DC and before at the Kahala during when it was being managed by MO.
I believe Kurt is staying on the Board of the Hotel owner, so he will still be around.
On a separate note, my recollection was that a good portion of the pool at the Pen BKK was shaded by the shadow of the hotel in the afternoon making it hard to find chairs in the sun. It's been awhile though, so perhaps my memory is not accurate.
To the OP, it's worth a trip over to Lebua for their skyscraper al fresco restaurants or at least a drink.