Genghis,
I appreciate the fact that you are trying to keep it simple, but some of your comments are misleading.
When accelerating from VS to VMP, both drag and power required decrease.
When accelerating from VMP to VMD, power required increases but drag decreases.
When accelerating from VMD, both drag and power required increase.
If Gin is working towards his ATPL POF or PERF exams, the above facts could make the difference between getting 74% or being happy.