Just a tiny bit of indo, on gearslutz Fabrice said he is planning on allowing graphical interaction with the curves directly on UI (like Equality or ProQ). They are contemplating releasing the frequency analyzer alone (without the EQ), and he sort of implied in a distant future, he might add other colorations options (read : analogue sounding "modes") to complete its current transparent philosophy. But as of now I'm guessing it would overlap with Slate Digital (which he co-owns) new products so it's probably not gonna happen soon.
One thing I think i'll use a lot is the possibility to hide the curve, so you only mix with the knobs. One of the basic designs of the EQ is that the curves mathematics keep loudness constant in some cases, so when you make the Q vary the perceived loudness is supposed to be the same, it's why it may sound strange at first when playing with the settings, the result should be a bit different to another eQ if you just copy the settings. The idea is to remove the loudness factor from your own judgement in your eq choices. So, this + not seing the curve should be an interesting way to mix only with ears
