Bonnie is an underrated brawler

Bonnie has been in the F tier for a long time. But since the gadget rework, she became much better.

"Sugar Rush" increases her movement and reload speed for 5 second. This allows Bonnie to rush enemies and quickly build up her super and since gadgets are now infinite, she can do this throughout the entire match. And what's interesting about Bonnie is that while being a sharpshooter, her super allows her to easily take down other sharpshooters, especially the ones that don't have any escaping tools.

Also, she has a big teamwipe potential, unlike other F tier brawlers.

The only thing she needs to reach A tier (or at least B tier) is Hypercharge, as it gives a big stat boost that she will be able to combine with her Sugar Rush gadget.

TO CLARIFY: I'm not saying that Bonnie is in the meta, i'm just saying that she became better since the gadget rework. She is still has many weaknesses, but she's not an F tier anymore.