More of a bug/wrong behavior report than a suggestion but I didn't find a way to report a bug... although I guess the derived suggestion would be to fix it ^^
On iOS I tried to assign new keys to control flight with my keyboard, but it seems that the default keys and the one I entered get mixed up. For example: I exchanged w and z in all locations to fit my azerty keyboard, now z pushes the pitch but also sets full throttle. Strangely w does also sets full throttle rather than doing nothing. A similar issue happens with a and q: after exchanging the a key actions both yaw and roll.
Apologies if there is a better place to report that kind of things.
I also didn't attach more details as I didn't know what would be relevant but I'll gladly provide whatever is needed!