Many of these John Portman designed properties have not stood the "test of time" very well, IMHO. Though they were all the rage when they first opened, many of his designs look dated, and what's worse, look dated to the '70s. The design, materials, textures, and fabrics of the 1970's leave many of his properties looking like set pieces out of "Logan's Run" or something, IMHO. Giant, futuristic, impersonal monsters, at times. Can anyone remember when the Westin Peachtree contained a lake in the lobby?
Chris Hemmeter was another visionary who created many of the "mega" resorts in Hawaii (including, keeping somewhat on-topic, The Westin Maui), and some of his properties are showing their age as well, and don't hold up to the current standards of luxury hotels of say the resorts at Lanai. But due to the timelessness of the natural "looking" beauty and landscaping of his resorts there in Hawaii, they seem to be holding up better than Mr. Portman's. IMHO.