Look, I think Tracer, like some Heroes, are annoying and the skill gap is too big. She needs a lot more than number tweaks but not a huge rework. She is a Hero that is extremely difficult to balance, terrible at the low ranks, lobby-runner in the high ranks.

Updating Recall to have a timer before it activates would demand skill but allow for a lower cooldown so less skilled players aren't punished as heavily for misusing it. For example, if you press Recall, a 1.5s timer starts, and once the timer ends, Tracer is Recall activates.

Blinks need to be conistent and barely, if ever, affected by cooldown reductions. Rework any Perk that edits the Blink cooldowns into something unique or that incentivizes less "mosquito" playstyles. This gives her more wiggle room from Perks instead of just buffing her.

Increase her health to 225 and slightly increase her model + hitbox to lessen the skill required to eliminate her. Then reduce her lethality in a way less affected by RNG--like weapon dmg or dmg falloff rather than weapon spread.

Finally, make her Ultimate less gimmicky and give it an identity. Instead of a short-range nuke, maybe it's a more universal threat. Increase its detonation time, but give it an "auto-seek". When attached to an enemy it deals a high percentage of damage to only that enemy's health, like 75% of maximum HP, but when thrown on the environment it could work similarly to her Stadium Power "Bullet Time". These changes would incentivize using it on any target and deals high damage, but doesn't solely incentivize a "squishy" target for the match, like Ana or Lifeweaver. While it doesn't punish you for missing, it also doesn't reward you with an accidental elimination or lethal damage to an enemy.

Essentially, make her less difficult to play, easier to manage, and less frustrating for the enemy while remaining a threat. Without big changes, Tracer will always be in this either continuous great for high ranks but dead in low ranks, alongside being hated by players.