Ok, let's look at how these could work.
In terms of our current techniques, AtW is closest to movement (though it could map to any of them), while GZ is offense, and wind shield is defense. They're where the techs will probably get most enhanced...
Offense obviously supports big DPS. Archery-wise, it supports an artillery/turret playstyle well. It's good when we want to rain fire down with our team, or get that big snipe off. Being able to do more damage in one shot is also handy if we're swapping to bow to finish a fight quickly before the mist drops.
It is also useful in a skirmish however. Being able to to do more damage with our knives is really helpful when we're wanting to keep playing.
Movement is more complex. Tactically, being able to control positioning can be huge (though it's less clear mechanically) - especially for a ranged support fighter like us. I'd expect both movement debuffs (AtW+), and movement buffs here, and this could have a huge effect. Both in terms of kiting and maneuvering inside a fight - but also (and perhaps more importantly) in being able to dictate the terms of engagements, and escape at will. I know a lot of people are going to say that clearly more burst is what we wanted in the jungle fight, given how short it was... However. I would suggest that the optimal strategy would have actually been to just outrun them. Being able to choose your fights is hugely valuable, and more movement helps us to that.
Similarly, for all those people who want more archery action, movement could allow us to escape to a safe distance to rain arrows back down on people, rather than being stuck at close range all the time.
In a skirmish, it supports our dodge tank kite and wear down strategy, which I know is controversial. It could also be handy if we're wanting to use our bow since it helps us to kite around and maintain a useful distance, rather than being stuck with people up in our face.
I would characterise it as the scout's option. It can give us a lot of advantages strategically and tactically, as well as useful utility. It is, however, probably less obviously strong in terms of increasing our raw numbers than offense.
Overall, both options are strong, and have a lot to offer us.