A FlyerTalk Posting Legend
Join Date: Jul 2002
Location: MCI
Programs: AA Gold 1MM, AS MVP, UA Silver, WN A-List, Marriott LT Titanium, HH Diamond
Posts: 53,006
This thread is tl;dr but I'd much rather have HH Gold + SPG Gold + HY Plat than HH Diamond alone.
HH Gold vs. Diamond is minimal loss. SPG Gold and HY Plat don't provide huge benefits, but they'd make me willing to consider those brands if I was ever in a place where I didn't have good HH coverage.