abirdcall
(she/her)
Yeah, you do get monk abilities to avoid stuff like this, but ki is a pretty valuable resource at low tier play and you dont want to use it for just anything. Just as well it consumes your bonus action meaning less attacks and less damage/you're in the same spot except now you're down a ki point. If it comes down to it i can eat an AoO, but I'd rather not do that very often.
You're discounting the cost of a feat here which is huge.
I mean, sure, having another way to avoid OAs that doesn't cost Ki is an advantage. But is it worth a feat? It's a specific circumstance where you have to run past 1 enemy. When you need to run past 3 or 4 to get to your target then Mobile is no good. If you don't need to run past any, then again it doesn't benefit you.
About the flurry thing correct me if Im wrong, but doesnt flurry just give you two attacks? If its the case that you cant re-target wouldn't the extra attack feature be the same way?
The general rule is that if you can attack more than once during an action you can move between attacks. Flurry is an exception as it states you gain 2 attacks immediately after the attack action. Without the word 'immediately' you would be correct.