The only reason I am still with Hilton is that Starwood and Hyatt hotels in London (where I have a majority of my stays) are almost prohibitively more expensive than the Hilton hotels there. I might as well stay at Holiday Inn hotels in London, though, as they aren't really worse than the Hilton hotels there. So I am currently considering that. Diamond recognition at the Hilton hotels I usually stay at (London) is almost non-existent. The points devaluation makes it significantly less attractive to suffer through the stays at London Hilton hotels just to use the points at some point in the future in one of the nicer Hilton hotels.

I'll probably requalify for Diamond this year as I am only a few stays away, then burn all my points before the changes to the HHonors program and hope for some Diamond recognition when burning the points and then take all my business to Hyatt/SPG/Priority Club from next year.