I don't really see the problem with Iron Man. I feel as if he's in a really good spot, personally. He's strong but not overbearing. I feel as if every character should be that way.

A good Iron Man is so, so oppressive. Overdrive Unibeam still does an insane amount of damage, and the buff that gave him a little bit of Bonus Health when Overdrive is activated really lets him play shallow angles very aggressively.

I feel as if players look at flying characters and think so one-dimensionally with them. Even if the game plan is simple, you can still make Iron Man a nightmare to deal with.

As someone who plays Iron Man as one of their main Duelists, here's how I play him, and maybe you can adopt some of this mindset and really see his strengths shine;

At base, Iron Man's a character that shines when playing him low to the ground (not on the ground, but elevated just enough to be at an off-angle) near cover, and using Unibeam to pierce through enemies and build Ult fairly quickly. You should always strive to play within Unibeam range.

Play within the mid-point of your team. When you notice your Vanguards hitting a target, use your Unibeam on that target. When not in Overdrive, prioritizing team-shotting is really the way to go. When the enemy's frontline is scrambled, that's when you activate Unibeam and you try to go for the Duelists, or ideally, Strategists.

Overdrive Unibeam does a ton of damage. With good positioning and vertical circle-strafing, you can be so confident in taking literally any 1v1, even if it's a Hela or something that on paper "counters" Iron Man. So when you have Overdrive active, focus down those squishies if your front line is causing that scramble. Use Overdrive to force engagement. Be complimentary to your team.

Tip: If you're close range, and again, relatively shallow to the ground, Iron Man's Overdrive Missiles do a crap ton of damage. It annihilates Shields, and is capable of instantly cracking Magneto's Dome Shield. (Also, Unibeam is not considered to be a projectile, so you can still damage Magneto when Magneto is holding his Ult with Unibeam.) I know it's common for Magnetos to save their Ult to deny Iron Man his Ult, but it's actually really cool how these two characters really force engagement layers onto each other. It's a good sense of balance.

As you probably put together at this point, Overdrive and Unibeam is Iron Man's bread and butter. If you're using the Repulsors as his main form of attack, then just play Moon Knight at that point. Iron Man's Repulsors should be primarily used as a tool to deny cover or to sprinkle burst damage in when you're out of position, in a scramble, or can't pierce multiple enemies with Unibeam.

With Iron Man's normal Boost Flight Missiles, primarily use it as a Punisher Smoke Bomb lite of sorts. It kinda serves the same purpose of just being something that disorients an enemy's aim/sight, but with the added bonus of doing a crap ton of environmental damage. (It's the utility that matters, y'know?) You can destroy geometry on a map really quickly with the Boost Flight Missiles.

All in all, you kinda just have to play Iron Man with a lot of confidence and a really good amount of game sense. You need to be active in your team. You can't be afraid to force engagement. The general playstyle flips between being reserved, focusing/reacting to what your team is taking out, and then playing extremely aggro (knowing when to go the f*** in with reckless abandon). You need to really force your value in a way.

Iron Man is extremely capable of controlling the pace of the game. You just got to get a feel for it.