So.... I'm returning to the 700's for the 4th time..
Awesome! Welcome back again.
The HD700 is a very unique design, and really, aside from the HE1, it really is one of Sennheiser's most recent design conceptually. Even with HD800S and HD660S - they are just tweaks to platforms that precede the HD700. The new HD660S (rumoured to use a similar driver to the HD700) won't have all of the 700s properties as its being put in a fairly conventional enclosure.
Instead of embracing a different sound, or trying to appreciate it, I think many people just were challenged by the HD700's signature - and I can understand that - but I think many missed out. It can take a bit of time to 'get it' and once your brain wraps around its presentation it can deliver very lifelike spatialization.
Technically, the driver alone I wouldn't put above a planar - be it HE560 or LCD2. But its tuning and interaction with the enclosure creates something very unique. But I may be underselling it, because I do reach for the HD700 10x more than my LCD2, mostly for convenience/comfort, but it is a very clean listen - more so than the HD650 was.