I must say, some Tim Hecker (and similarly, Ben Frost's ambient moments) match what you're saying exactly. Whatever interesting things may be going on texturally in some of their pieces, and however much I enjoy these more extreme approaches to distortion, I find the harmonies behind it all so obvious and saccharine that the music trips up on itself. Now, I don't see any division between melodics, texture, production, harmony, or whatever other divisions people make: it all melts into one. And the musical clash of fragility and beauty with sonic violence is so exciting when it is done well. But this case is different. I've read people describe the harmonic movements of, say, Tim Hecker's 'Harmony in Ultraviolet' as 'emotional', but I find it hard to get emotional with such tried and tested progressions, and the excellent sonics actually makes the lack of imagination in that department all the more apparent to me. It's a weak juxtaposition, which is a same, as in theory I should love such a combination.
PS - I should say do like some of these guys' music very much!