No, I just was typing fast and grouped everything together I could think of. Embassy Suites is one of the OG "suite" chains that I'd characterize as "formerly high end, maybe mid-level right now", but YMMV.
I wouldn't characterize any of those as genuinely low-end which I'd reserve for things like Travelodge and below. Probably various shades of the midrange scale with some on the upper and some on the lower side. I'm in a Marriott SpringHill Suits at the moment which is boring but clean and comfortable enough.
Yeah, it varies. I think fundamentally you're paying for square footage, so bigger rooms will always be "mid-market", to some extent. The ones in tourist spots are fancier than the ones by Exit 5A of a freeway interchange in rural Nebraska.
The suite hotel I used in Maui, for example was pretty fancy: pool, restaurant, bar, gym, balcony rooms, etc. But the price point was certainly below equivalent hotels in the same area.