I only have the UK version of the Clash's debut, oddly enough. I got this boxset of theirs with two bonus discs combining all of the US-only material on their 1979 "debut" plus the singles on Black Market Crash and it's Super edition, and a disc of demos and live stuff, called Sound System. Haven't heard the remixes of the albums proper which are supposed to be quite different, but having heard the original mixes of "White Man in Hammersmith Palais" and the like and the mixes here, I should be in for a pleasant surprise.
Good point about DG's two sides being frontloaded. It always seems more prominent on the second side since it ends with three (or four for those who don't like "We're Going Wrong") non-highlights versus side one's one.
The Doobies are far better than people give them credit for, I'll just leave it at that.
I've always preferred the UK versions despite the lack of singles, especially since 2013, when iTunes gave me the ideal tracklisting for those numbers as the "bonus discs" on a "boxset" compiling their albums and EPs from 1964-1969, called No Stone Unturned, Vols. 1 & 2 eliminating redundancies (I wasn't about to spend 200$ for a 10+ disc boxset on iTunes for only two discs, so I just compiled the material myself from various compilations I had).
I only know "The Thrill of It All" and "Love Is the Drug" from their later albums, but I'll get around to those albums soon enough. Not quite sure what you mean by hammish, though.