From what i have known from the roger linn statement, yes adrenalinn cannot set output as thru, only out, thus far the AD3 block the command  to the eventide, so as eventide cannot learn what midimate command, my midi solutions thru is few weeks away until i can test with it, the weird is if i put all the eventide behind AD3 , and i tap something on my midimate. It seems  my all eventide receive midi clock, and it sync with the drumbeat tempo on my AD3, but not #cc or #pc on the eventide