I don't think Diablo and Torchlight had any influence at all on the current surge of roguelike-likes ushered in by Spelunky and FTL, though. They basically draw on completely different aspects of the roguelike tradition: the former takes the superficial D&D-esque dungeon crawling, plus lots of high-grade polish and minus the permadeath and much of the variety. The latter instead focuses on a wildly different experience for each runthrough, with permadeath as a matter of course, and can draw the superficial surface from anything (Indiana Jones-esque platformer, top-down crew management sim...)
