She's every bit as good as the real thing. By which I mean India went back to using AKs shortly after.

She has a very weird and complicated set of skill interactions for a role that really just wants good, consistent dakka. Has a funny combo skill with M82 (the bullpup AR, not the RF). In terms of performance she's actually not awful, but she doesn't stand out, and there are enough good ARs to use other than her.

Suffers from there being a more famous, better M82, also with pink hair.

This one is basically interchangeable with Tavor, who by now isn't nearly as useful because you should be drowning in high-end ARs. If you are not drowning in high-end ARs for some unfathomable reason, well, she isn't the worst thing ever.

Also has a combo skill with AK Alfa if you do the side story stuff, but AK Alfa isn't exactly wowing the charts either.

She's a generic login AR. No one cares.

Ok, so she isn't actually bad. She does, however, have a stupidly long skill like a JK cramming for an entrance exam, most of which is largely irrelevant because all you care about is her damage output.

Which I guess is kind of alright.

Her skill has a good initial cooldown, and she's actually better than most ARs, but she won't usurp the position of the top ARs. A good pick for your B-team.

The Steyr ACR is the gun the Pallet Rifles in EVA are based off of, and this one is about as useful. On one hand, it seems like she'd be good for para fairy and its debuffs (you get +25% final damage with that), except it isn't enough to make up for the debuffs still. It's also not very easy to get debuffed. Evaluation may change based on future enemies, but really it's not worth it when you have so many good ARs to choose from.

No, she's not a video tape. One of her skins shows her recent arrival in the US has apparently given her quite the dump truck ass. Must be all the McDonalds. Her skill powers her up with extra stats relative to the enemies she's fighting, meaning she has basically no real use vs. mooks. Potentially handy vs. bosses, but being a RoF-focused AR, she suffers from chips existing.