Yeah...so the only time I've had remotely personalized, memorable service at an RC was after I got the ear of the GM due to a billing issue. After that, it was like a switch flipped. But for my normal stays as an AMB, it's pretty much nothing - nearly nonexistent recognition, and I sometimes feel like I'm an annoyance to them (e.g. when inquiring about an upgrade with many premium room types available).
Many RCs in the US are just glorified Westins / MRs with more gold/wood (if 90's vintage) or stark white decor (if 2000's vintage) and an expensive club that gives you basically the offerings you'd get at an entry-level lounge in Europe or Asia.
And look at the signal that MR corporate sends by carving out exclusions from RC for its elite program - basically straight up telling RC "You don't need to do anything for our best customers".