So with the assassin rework coming up, I feel like this is a good opportunity for pantheon
To be reworked more into a fighter and have much healthier gameplay.
As it stands, he's a pretty damn binary pick with a very abusive, low interaction lane phase. His passive is interesting but bullshit in the way it applies, but it's only this way because he pokes you from range. So he is superior from range and in close combat, which is a big part of his problem.
His windows of weakness depend entirely on whether or not he's been shut down or killed pre-6 because otherwise he builds up a huge advantage in lane. It honestly gets to the point where dealing with him is entirely up to the jungler, because most champions either have to out range him and not interact or suffer endlessly as he spams Q off cooldown.
I actually think pantheon would be the ideal fighter type champion given his character and design. I'd like to see him flourish more in a close combat role but be less oppressive from range, kinda suffering from the same problems like vlad and Shen had where they had point and click, low CD harass.
Either way, I think this is a fantastic opportunity to rework one of the unhealthiest champions in the game.