Junkrat is the biggest one trick and lowering his mine was not enough of a Nerf to make him less of a must pick on every team. Phara is the DPS not Junkrat. He should have a stronger ability to hold/submit with that trap and less damage out of his primary gun, which would then make him appropriate for the defence category. Heck give him his mine AOE back even just nerf that grenade launcher. Until that happens he's always going to be a must pick as the main person who does a similar job is Phara and let's be honest when you're looking at a Phara or a Junkrat for explosive aoe push damage, Phara is just trash in comparison, junk can shoot faster and generally with more hits. Plus the submit and mines. Phara is a slow af target in the middle if the sky with no damaging abilities.
Junkrat needs a nerf
Phara needs a buff/new ability, D.Va has rockets why not give Phara a shoulder laser or something so she has something to deal a bit more damage with and gives her a bit more flexibility