An interesting concept, but one that I can foresee being given to a lot of abuse sadly - inevitably someone would discover an exploit for using a buff draw repeatedly, and then in an attempt to stop the exploit SE would just end up nerfing the whole system with a patch, virtually ruining it for everyone else.

1.0 had something vaguely similar when you started levequests at an aetheryte where you could invoke your guardian from the Twelve to confer a 'Guardian's Blessing' buff for a short while, but that ability was removed on a patch (apparently replaced with the /pray command for the 7th Umbral Era storyline as I understand it).

Maybe it could be reinstated for ARR, or make it that when you touch an aetheryte you can select a short term status buff like the draw point idea, but have it so that doing so would use anima, hence reducing the tendency for people to abuse it. Either way, I like this idea.