The problem with Hob's Barrow is that it doesn't know when to get to the point. It builds suspense successfully, but then fails to build to anything meaningful until the closing hour or so of the game.

Inevitably, this means the ending is disappointing, because it tries to cram too much "stuff happening" into too small a space.

Combined with far too few puzzles spread out over too long a running time, this means Hob's Barrow is a pleasant enough diversion while it lasts, but it can't sustain itself and won't stick long in the memory afterwards.