Am I the only one who thinks these sound like fun, at least for outdoor content? I expect to use these lots, even if I swap out of them for serious content. They seem especially appropriate for a Night Elf (the wisp part), although I suppose the spirit of the sentinel could extend that racial even to non-Nelfs.
Of course they may be fun, and useful. In fact, leveling or doing any kind of farming those boots are a god-send.
The issue is those boots only serve one purpose, and is saving time. They don't offer any DPS advantage whatsoever while other legendaries are a direct increase to it.
Fun? Fun?!? Those will be hell of a fun! As I see it for myself, and depending how is the area around ToS, those boots will be mandatory for me. Given they have 3 sokets and how Havoc mastery work, these will be beast for doing outdoor content in 7.2 and till the end of the expansion (I hope).