I've had to execute a go-around from minima on this approach - almost immediately ATC instructed us to turn south and climb to 3000' and re-contact CDG approach. But in the absence of ATC instruction/blocked frequency etc then I believe your assumption is correct - you'd have to descend to 700' if you were higher at the point of going missed.
Important note to bear in mind is 700' is 480' AGL which may be below your autopilot engage height - hand flown missed approach....? Depending on type.