I see. Then I’d like you to fix the issue with key repetition when the keyboard is blocked.
This one. Key repeat is important for navigating in a text.
And: This “F” thing is called Homerow. That means keys your fingers are already resting on can be used for different things.
You can set that up really well with BTT (block/unblock the keyboard). Even pressing two letters at the same time (as two modifiers) and then a third to trigger something works perfectly. And more than that. It took me a while to solve all the problems. But now I’m ready.
As soon as you’ve solved the problem above, I’ll post a preset for everyone. I’m surely not the only keyboard fan here. Or am I? 
Will you solve the problem mentioned above? 
