While in the pocket, passers with this ability are almost guaranteed to evade the first sack attempt by a blitzing defensive back.
Improviser - QB
Scrambler - QB
MUT 22 Players with Agile Extender
Advice from Huddle.gg
Agile Extender has some value as you'll break the sack from a lot of meta blitzes that are designed to get a DB in for free. Even if you manage to break the sack, a lot of times another defender will get to you before you can complete a pass. There are better options for QB abilities.