One important thing with her mod is that she has a backwards facing tile now. This means fun times for Python fans, Nagant users, or users of any doll who prefers to be in the middle of the back row and could benefit from an attack speed buff, which happens a lot of the time. She also debuffs the enemy if the node you're fighting on is controlled by you, and buffs your attack and move speed if it isn't, but those are kind of icing on the cake for an already useful doll.

Oh, and the move speed buff is hilarious when combined with other move speed buffs, turning Hanyang Mod into a a rocket. This makes some boss fights hilariously easy as you give no fucks about their mechanics, and 60s is long enough for most battles.

You can probably leave her at Mod2, but her Mod3 equip is a suppressor equivalent with +20 evade at max. It's up to you whether that's worth it or not.

A doll that suffered from looking really cool in the previews up until people saw her face and went "wtf is this."

Her skill is unique, and answers a question nobody asked. While not completely useless, there's nowhere really where it's actually required. The RoF boost is.... kind of paltry and borderline useless, so all she has going for her is the movespeed boost.

If you really REALLY hate dealing with dreamer and otherwise suck at micro, this might come in handy. Other fights like typhons however, are more reliant on observation and dealing with the early onrush of mobs, since HGs like Python and Contender, or SMGs like CMS, are fast enough on their own.

Oh right, if you do plan to use her, do note that as usual, you cant do shit while moving. Be wary.