I'm the opposite: closed time loops are neat and clever to me, while the "change the past" stuff always seems sloppy, cheap, boring and implausible. Aside from John getting unstuck, Homestuck is actually pretty good about keeping the time loops stable and plausible (so far); stuff doesn't change, but always happened that way and caused itself to happen: that makes sense. (In the alpha timeline, at any rate- the doomed timelines are another kettle of fish, but as far as dealing with time paradoxes, it's inventive, at least.)