Doomfist’s ult is nice in that it removes Doom from the game and so he’s not going to die just using it but no.
Instead make it work like shadowstep/teleporter work like Symmetra’s ult or Mei’s wall. Both of those abilities are very easy to place properly (though Sym’s is often not very useful because enemies can walk through it).
It throws a line up that can be rotated, the line length ends where a wall without a flat-perchable-surface begins. Activating ability places the Reaper/destination_portal at the highest perch at the end of that line.
Doing this would reduce lag and give Symmetra portal that can actually be useful distance away from the actually.
But Symm still needs more armor/health or her shield back cause she is way to fragile to be good at close quarter combat.