Strat area is bad but stay on the Strip for any walking and you'll be fine. Plus you can uber. The STRAT is in the middle of a remodel (and rebrand to the STRAT) but idk how much of the room product is updated today. [As of a year ago I see this:
https://www.gamingtoday.com/industry..._of_Guestrooms which says you want the 'Elevate' rooms, that they are still cheap, and that 252 of them are remodeled. I believe they have like 1500 rooms total.]
Luxor isn't a ton better in terms of room quality ime, but yeah definitely better location esp with the tram and not as sketchy.
Doubtful you can do much as diamond if you wont be here. Of course if you call one of your diamond friends out here they can probably check in and get a few keys and do the old switcheroo.