And Skyrim isn't a hack and slash?
Compare Skyrim's and Dark Soul's degree of freedom and choices aside from those of the spreadsheet. If Skyrim is a hack and slash so is every TES game since Arena. Only Daggerfall had different endings and the only thing lost from other games in terms of RPG-ness is the spreadsheet (maybe the spellmaker), but you can still roleplay in several ways, and new cities and wilderness are surely way more beliavable than those of previous games due to random encounters, NPCs having schedules and working, talking between them about something different than mudcrabs, etc.
I've enjoyed every TES game until now (save for arena, battlespire and redguard, which I haven't played), and Skyrim ain't much different if you don't jump into the nostalgia trend.