Do folks put a value on the complimentary (silver) United status that Titanium will have?
I assume a lot of folks traveling that much will already have status on the airline of their choice - but as someone who doesn't have United status, if I was close to 75 nights, it's enough to sweeten the deal to have a backup airline option for me to stay a couple extra nights at Marriott/Bonvoy properties.
(Also I don't see how an early check in can be necessarily a guaranteed benefit - in the fall I showed up to a hotel around noon or 1pm and was told that the hotel was completely booked the night before and the room I booked wouldn't be ready for a while due to plats and PPs using their 4pm checkout!)