Poorly worded legalese, IMHO.

I suspect that internally, at Marriott corporate HQ, the terms "guest room" and "suite" hold different definitions. In other words, sentence 1 simply says "We'll get you high floor, nice view, C-level if we have it, away from elevator, away from ice machine, etc." It doesn't intend to commit to true suites.

But then sentences 2 through 4 go on to point out explicitly where suites are excluded, thus implying that maybe they're on the table at Marriott, Renaissance, JW, Autograph, etc.

It's clear to me that regular Marriott hotels don't intend to give suites to Plats often at all. Through hundreds of lifetime nights, that's my brand expectation. Nice deluxe rooms or junior suites, right bed type 100% of the time, nice amenity, lots of bonus points, and overall good treatment as long as I avoid the resorts - all of that is true, but suites IME are not unless I write a letter making a one-off appeal to the GM for one. The only thing I fault Marriott for here is poor copywriting in a few areas on their site (not just related to suites...sloppy T's & C's are found in a few different areas on the website).

By the way, that junior suite in Des Moines last week - a nice big room with a mini-kitchen, couch, and sitting area. Not a real suite, but still a fine room - exactly what the spirit of the upgrade benefit should deliver. ^