What Warframe do you want to see reworked next?

After this latest round of magnificent reworks and changes, I've been thinking about what Warframe deserves one next. What are your thoughts?

Me, I think Valkyr is probably it right now. It was one of the first prime I got way back in the day and I really liked the aesthetics and the idea. Now, I feel like she feels terrible to play and also largely useless. Let me explain. 2 of her skills (1 and 3) are simply mostly useless. War cry (2) is a nice attack speed buff, but the armor buff part seems weird on a frame that relies on inmunties, and the slow part feels strange as no one would build Valkyr for range. Finally, her star ability, Hysteria. Let's start with claws. The only thing it has is raw damage and CRIT. It has completely garbage status chance and can't even build arcanes or combo mods, it has terrible range, it's IPS is evenly split, the stance is terrible and very inconsistent, and you do not have the aura points which makes it incredibly hard to get in enough points for a build with tennokai or even without tennokai but with an umbral mod (unless you wanna use a rare and limited umbral forma on a terrible weapon). Honestly, it's just... Bad. Even at level 150 steel path, where most melees work perfectly fine, the weapon falls short. Next up, the skill itself. Complete damage immunity sounds great, but as long as the only weapon you can use whilst immunity is on is garbage, then what is the point? You're not gonna die, but you're not gonna kill anything either. Thinking on the range and utility that other exalted abilities have, Valkyr just feels bad. And I get that the complete damage immunity is very strong, and you can easily keep it up pretty much permanently with decent efficiency, duration, and help from arcane energize or equilibrium, but I honestly rather it be like Baruuk, where he is already extremely tanky although not inmune, but still actually useful.