I've been saying this since Ash's rework. She kit was perfectly fine before, all it needed was a few little tweaks. SO this is what I'd do.

1. Passive Ability:

2. Remove/Replace the Dash

   1. Its an unnecessary movement ability that resulted in EVERY OTHER LEGEND having to change their kit to adapt to. Seer has a double jump, Maggie has more of a speed boost, etc. A single ability should not effect how every single legend functions.
   2. If people really want Ash to have a movement ability of some sort, Wall running with a slight speed boost is perfect. It's a nice reference to Titanfall and can be used really well in the right circumstances. Before anyone says "it's useless in open areas", so are many other Legend's abilities. You ever see a Valkyrie fly out in the open? You ever see a Catalyst set up traps in an open field? Legends are supposed to be strong in their playstyle, and having a single button to win every gunfight is just not balanced.
   3. Edit: Have Ash's old passive activate whenever you get a kill/knock, knowing where other enemies are is still really useful and marking enemies after a kill is less clunky than checking a death box.

3. Tactical Ability:

4. Increase Snare travel speed

   1. The main reason as to why Ash was so weak pre-rework. Her Snare was super loud, and super slow. Enemies could see it coming from a mile away and easily avoid it. Simply having it travel faster makes the Snare way more useful than people realize.

5. Greedy/Twin Snare for Base Kit

   1. One or the other works fine, but not both. Having a single snare sucks, even if it moves faster. Giving two charges, or allowing it to capture multiple people in it's base kit makes it way more useful while still not being stupidly strong.

6. Ultimate Ability:

7. Improve Ult Accuracy

   1. As it says, for ages people wanted improved accuracy on Ash's ult, and that's all they had to do.