No. Your thinking IS correct, however there are more steps that need to follow.
If the V1 you wanted at first and needed to stay within ASDA falls below Vmcg and thus is unattainable, the take-off is not allowed. The risk you discovered is real and not acceptable.
To increase V1 back up to Vmcg you can reduce the take off mass (Ek = 1/2 v*v*m), and the Vmcg (unchanged) will be inside the valid V1 range (ASDA to TOD/RA)
Last edited by FlightDetent; 11th Dec 2020 at 21:09.