Guys that B1 DB2F (or DBF2 if you mess up lol) is really not that difficult (thank god).
I practiced just a bit and can execute it fairly well already.
One thing to watch: if you want to do the DB2F too fast you might skip the "D" part and just start with a diagonal position. In that case you do not get the move.
I started doing B1 DB2F just as fast as I do the B1 xx DB2 on Kotal Kahn... If you do the F moderately fast the move comes out so brilliant. Like you do a far sun ray. That is not so horrible at all (just put an F after it).
Of course I need more practice for muscle memory too but if you have the muscle memory from Kotal thick choke you will be able to do it as well. And you can practice it playing Kotal, too lol.
So the tip for DB2F is brilliant!
That makes us unstoppable.
B3 DB2F however seems a bit more strict (need to do faster than B1) so maybe practicing DB3 F2 might be better it is much more relaxed (worst case you get a D3 xx command grab which is just 1 frame slower / less range and opponent might not block low lol).
EDIT: after 15-20 minutes practicing I feel the pain in my finger.
It is not worse than practicing fireball cancel on Scorpion.