Ashe Concept Rework
First I must say that Ashe's kit is really solid right now and that she really will not be getting massive changes for my ideas, just mainly quality of life features the biggest of which all her abilities will interact with Focus when it reaches 100 Focus stacks.
Focus (Passive): Unchanged, the ability still stacks focus stacks when you have not attacked anything in the last 3 seconds, the starting focus stacks is your critical % and the focus stacks stack faster based on Ashe's level. In addition though your Focus now amplifies one of your abilities (still critically striking) consuming the Focus stacks in the process.
As a safety feature, which only would apply if you happen to get 100% crit chance, Focus has a 3 seconds minimum of not attacking anything before you can use Focus and a Focus empowered ability again.
Frost Shot (Q): Toggle ON: Apply a 15/20/25/30/35% slow for 2 seconds on-hit (8 Mana per basic attack). [Unchanged] Toggle OFF: Gain 20/40/60/80/100 bonus basic attack range. [NEW*]
Passive: While toggled on, Consume 100 Focus to stun your target for 0.75/1/1.25/1.5/1.75 seconds instead of slow.
Volley (W): Unchanged
Passive: Consume 100 Focus to cause all 7 arrows to critically strike.
NOTE: Volley does apply Frost Shot's slow, but it obviously cannot stun with Focus because not only a long-range AoE stun be super powerful with the AoE crit, it would take away the decision making of using Focus when it is readied.
Hawkshot (E): Unchanged
Passive: Consume 100 Focus to apply vision on units spotted by Hawkshot for 5 seconds and reduce Hawkshot's cooldown by 60% if any enemy champions were spotted. Afterwards your next basic attack within 6 seconds will critically strike.
Enchanted Crystal Arrow (R): Unchanged:
Passive: Consume 100 Focus to cause Enchanted Crystal Arrow to deal 50/75/100% increased magic damage.
Hope you like the idea! ~ Stacona
EDIT: Some changes I added on to increase Ashe's decision making (giving her more choices) where Frost Shot has some extra utility between having the Toggle OFF to gain increased range or the Toggle ON for the on-hit slow but lose the very long range while still consuming mana per basic attack for the slow.
The other change is the empowered Hawkshot will no longer refresh the ability's cooldown but reduce the cooldown by 60% instead, while Focus is consumed when you use Hawkshot your next basic attack will still critically strike if you attack something within 6 seconds so that you do not lose out on Focus' main purpose which is grant a free/guaranteed critical when it is up.
Also as a safety net if you happen to have 100% critical chance Focus cannot be used again until at minimum of 3 seconds of not attacking anything. This is to prevent perma-stunning / having every ability empowered which takes away the decision making of this idea and playstyle.
Let me know what you think of these changes.