It's irrelevant that they're warming since they've already been sold to the retailers. Hasbro also saved cash by not having to to create any new molds or paint schemes. Hasbro made made tons of money off of greatest hits. If anyone is going to loose money, it's the retailers.
While I agree with you in the short-term effects of this, DA, I think that Hasbro may end up being bitten by the GB/H&V figures in the end scheme of things. With 90% of the pegs being occupied by those figures in most major retail outlets (I seriously counted at a Target in a nearby town yesterday and out of 40 figures on the pegs, 39 of them were GB/H&V; the other figure was a lone Utapau Clone Trooper, also from ROTS), the later waves of the actual basic figures for this year will be ordered and shipped in less amounts, and there will probably be an ocean of Threepios and Padmes on clearance aisles come January (or whenever the SKUs are discontinued for the 2006 figure lines).
My point with this, fatalistic though it may be, is that retailers look at the mountains of unsold SW figures, regardless of who they are, what assortment they are part of, or anything other than the fact that they are SW figures, and think "These aren't selling." They devote less peg and shelf space to them in the next reset planograms, and when there is less space, there is less ordering, which causes Hasbro make less money. If basic figures, which, all things being equal, are the heart and soul of the SW line start to be ordered in smaller numbers, then Hasbro is going to produce less and less to the point where, 2018 or not, the line is going to die.
So, while Hasbro is undoubtedly laughing all the way to the bank about the H&V/GB assortments right now despite their pegwarming status that would make the Rancor Keeper and Sabe proud, the massive glut of those assortments at retail could end up hurting Hasbro (and us) in the long run.