I am not a fun of electronics too gekka. They are not reliable, they dont work as expected the most of the times, they cant use all the power of the battery, and you have to be careful with them. On the other hand, mechs not only dont have these problems but they allow you to vape at any watts.
The only reason for electronics is to avoid burn taste like on Proteus, something important, especially for the new vapers.
I know what you mean about esterigon and I agree that a knurled locking cap would be ideal. Or maybe a new locking mechanism that I have in mind.