It's basic.i suggest u go for one of the Méridien hotels
+1!
W is nice, modern, premium Vodka party.
But as a Plat you go to SGS. It's very old school compared to W but the soft services and benefits are fantastic. Check again if inventory opens up.
LM Surawong are good with suite upgrades but quality of happy hour has been cut somewhat. Still a good stay when you get in around 3900 Baht.