The 700e problem I was talking about... The torque available for the rotors decreases yes like tony said as the gear ratio becomes smaller and smaller the torque will be lower on the head
Now was there too much torque to begin with on the 700e drive train... Yes.
How did they fix it.. Yes they put a bit larger pinion ... And changed the tooth count of the main gear and improved the material
But there are two main factors :
The main gear ratio didn't decrease by much... I mean the fear ratio was somewhere at 9.5 , got reduced to 9.33..
They went with a slant (helical) main gear only so you have more surface of contact.
This is huge factor when I talk about my nitro bird.. That thing will see a lot of change as it has just exactly enough power from its engine and a change in gear ratio to a smaller one (larger pinion) will mean loss of torque so I would try to keep that in control.
As far as these electric monsters are concerned.. When you already have double the kw in the motor, that's not a huge factor
Fly safe!!

have fun!