Since his launch, Doomfist hasn't quite lived up to his name. At the moment, he is one of the least used characters in the game, a far cry from the hype and fanfare that surrounded him. There are, of course, balancing reasons he's currently so low on the pick list, but a slew of bad bugs have also marred his popularity. It's been quite a big issue for the community.
It seems fixes are finally on the way though. Blizzard has just released a patch on the PTR, and Principle Designer Geoff Goodman took the time to outline them on the Overwatch Forums. Ub the post he let on what had been immediately fixed but also added that even since putting out the patch on PTR, more have been figured out.
Wall slamming should be much improved. The wall slamming logic has also been simplified so players should find that a 45 degree impact angle is the cutoff between the target being slammed into the wall, or sliding off. This is the biggest change that should be noticeable instantly.
Rocket Punch now breaks breakables again. Not only was the bug fixed that caused it to no longer break breakables, but the system we have in place now should break them much more consistently than before
Seismic Slam being canceled when landing too close to a wall should be fixed.
Seismic Slam will now 'slide' a small ways up ramps instead of instantly triggering. Winston's leap has also changed in the same way. The slide distance is manually tuned so let us know if it seems like he is sliding up ramps too much or too little.
Of the fixes on the way, perhaps the most important one is a bug where Doomfist goes straight through another player while trying to smash them. That one is a pretty important one since it's pretty much Doomfists whole thing.
I do hope, as well as fixing the character's bugs, they do reopen Doomfist as a character and tweak a couple numbers here and there because the ol' guy could definitely use a hand in the meta at the moment.