A question about Twitch's VU

Hoping I can get a Red response, first time using this beta.

I like Twitch's VU, especially that scurry he does with homeguards. But one thing really stood out to me.

Old Twitch just kind held and fired his crossbow with one hand like he didn't really know how to use the thing. Exactly what you'd expect from a sentient plague rat.

The new Twitch has like this crossbowman's swagger. His back is straight, he braces his crossbow against himself, he looks dead-on at his opponent with his head high, and his legs are apart to achieve maximum balance.

This is something I'd expect from Vayne, to see Twitch using it is kinda jarring. Was this a conscious choice? Or is there some other reason? Because, to me, it clashes violently with his character.