as someone who has tried to level sundance for a while, just lol and you don't know what you're talking about
up until THIS PATCH, sundance's grenades would just chase after aircraft miles away instead of the tank in front of my face.
so what if wingsuit has no cooldown? do you know how many limited options there are to deploy it, and how frustrating it is that a rock you think should be high enough off terrain won't get you anywhere?
pre-patch, switching grenades in your belt was ABYSMAL, it took way too long.
Now? It's better
The biggest buffs sundance got in the latest patch was to maker her actually viable. The scatter grenade was near worthless pre-patch and now it's ok but not OP. The armor grenade locks on what you want it to, but it won't destroy everything in sight (like in hardcore).
Plus, getting her to tier 1 has been a grind to say the least: she only levels on grenade belt kills/assists: so that means only scatters (1x scatter kill avg every 5 maps pre patch), anti armors (hoping to finish off vehicles that have been hit 2x from m5's), and EMP grenades (just worthless) count towards her leveling.
I don't think you've ever tried to main sundance, tbh.