And this is the main thing I believe is being overlooked here. I have played a fair amount of Artanis into Tracer, and if she doesn’t kite me, I can destroy her, but a good Tracer will always be just out of range, unless I take the W talent at 20. Which I never do against a Tracer comp, as I will typically go Suppression Pulse at 10, and its upgrade at 20.
Good Tracers are never moving directly to or from their target, but strafing, circling, or Blinking in and out to apply Melee or Pulse Bomb. I can sometimes time the W for when I know she wants to come in, but if she is just using me to charge her heroic, there isn’t much I can do unless I get a Chrono Surge swap in, and can slow her down for a few. It is the same reason Blades of a Templar is a must pick against Tracer, as the slow is what allows you to get some damage into her.
Regarding the OP and the discussed changes, a lot of them don’t really seem to address Artanis’ core problems: how one-dimensional his kit is at the moment (single target damage), and his reliance on the enemy team not understanding how his trait works. If he can’t AA other heroes, not only does he lose all of his damage, he loses the bulk of his sustain as well. In addition, it is incredibly easy to bait out his shield, wait it out, then nuke him.
I don’t think your changes really address either of those issues. One suggestion I usually make when this topic comes up is a talent that immediately resets the CD on his trait when certain types of CC is applied (stuns, roots, blinds, for example).
Giving him more AoE options, and some sort of poke tool that doesn’t involve his face (checking bushes on Artanis is difficult) would certainly help, but a lot of the suggestions I normally see, such as him being able to cancel Blade Dash at any time, have their own set of challenges. Giving him tools that make it too easy to engage or disengage means that his damage would likely have to be toned down. When he can get on you safely, he can wreck most heroes. Making it always safe to get on people could easily set up him to be fairly overtuned with his current kit.