Actually read this before commenting.
I think that shoulder charging out of a slide is ridiculous. Also in mid air. To shoulder charge you have to be running, not floating or sliding. It just doesn't make any sense and shouldn't be in the game.
Edit1: It's not the midair SC that bothers me as much as it is the slide
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The slide element came in with TTK and to be honest I would be fine with it being removed. As far as airborn SC I say leave it in but make forward momentum a requirement, so you would lose your charge if you floated straight up or met a solid surface that stopped forward progress. It isn't OP in my opinion but I would be happy to concede those changes.