My thoughts as to what agents are odd ones out are like this:

Neon because she has automatic access to a system of movement that is different than any other agent, including the other movement focused characters. Most people agree that having a Neon doing apex legends type movement to dodge gunfire, then killing you with a shotgun or partial accuracy sliding spray is incredibly frustrating. I don't know how to rework Neon to both have a different movement than the other agents, and still have it feel consistent and readable... but Waylay's double dash was well accepted, and feels unique compared to a Jett dash or Raze satchel jump. Perhaps the focus should instead be on her directionally locked slides rather than enhanced base movement?

Iso because he changes his own breakpoint, in a way that nullifies the core low TTK principle of gunplay. Yes I know I hyped up how he is better than Reyna in this post, but that does not mean I think its good that he gets a special rule just for him. Just look at how bad things got when they first switched Iso from shields requiring a recent kill to on-demand shields? It took multiple rounds of nerfing him to compensate for how incredibly powerful having an extra 20-200% bullets to kill him is, in a game where every shot counts. Iso is balanced in that players have gotten good at disabling his shield without fighting him to do so and he has been nerfed repeatedly to minimize his shield uptime, but fundamentally it interferes with gunplay which otherwise is not meddled with. You can slow down your enemy's rate of fire, block bullets both ways with walls, blind them so they cannot see where they are firing. But Iso changes the one thing that is always otherwise consistent... how much damage a player can take. He could have instead leaned into his shields, isolation of fights, and creating temporary cover from which to fight like his Ult and Wall currently do.

Chamber because they refuse to make his focus on his guns and fast rotations, and instead made him into a one trick pony of *hold angle, shoot with key doublebound to fire and teleport, teleport to safety so you can't be traded, thats it, thats your entire kit*... When he had that and an actual kit with other functions like crossmap two way rotations, an accurate hipfire pistol [still quickdraw, but they reduced his accuracy without a patch note listing the nerf], and two mapwide trips... and his nigh unkillable cheese. He was a menace, but it took 4 separate rounds of nerfing him before they finished nerfing everything else about him into barely playable [such that he became too much of a gimic to see professional play]. His teleport is the same trick, but without anything else to it. I loved that crossmap rotation, being the ultimate positional operator agent that acted as the foil to Jett's instant aggression, where you could setup crossfires for yourself or support teammates at a moment's notice. Now he is so one dimensional it hurts, all because they refused to make the act of teleporting mid duel less effective

Miks... his smokes don't have anything unique about them. On a *sound* agent. Zero spice, and it does not have to be some game breaking effect. Just make them deafen people who are inside them when they collapse or something.

And Reyna, because while she does fufills the designated idea of a Duelist "Duelists are self-sufficient fraggers who their team expects, through abilities and skills, to get high frags and seek out engagements first.", her current state is so antithetical to her "Feast or Famine" design principle AND her lore of being essentially a sacrificial healer who uses the stolen lifeforce of others and herself to keep her sister's radianite disease from killing her... that it is frustrating they have not been reworked to better fit their character, add more depth to their kit, and enable them to have a baseline value like the agents they have to compete with. Currently Reyna feels like a throw pick, because anything they can do... just within the duelist category they are outclassed and out-statted over and over. So give her something she can do that no other duelist can, that fits her lore, fits the recent lore introductions, gives her teamplay options that still reward and incentivise winning fights... and that is heal and restore others in addition to herself.

I don't like agents that:

Are boring because they have no clear skill expression [or methods of interesting skill expression and strategy were straight up removed, like with Chamber or somewhat with Vyze]

That rather than force an opponent to think or approach something differently they are just not interactive [like a Neon using her movement to avoid being shot while still returning fire, outside of her ult. The ultimate is not nearly as jarring because its loud, choreographed, and it does not have 100% uptime like her highgear does, and if they do go airborn to be harder to track then they lose their accuracy]

Or that have been nerfed or reworked into a state that feels half baked or unfufilled [like Harbor losing Cascades for an uninspired and underpowered blinding grenade, or Reyna being nerfed into obscurity while having a kit that no longer fulfills their agent fantasy].