This is not about push, high ground is what makes push a bad game mode.
I was playing Hanaoka i dont know if theres another clash map, would be nice if we had more. But every game ive played always ends up with 1 team pushing to final spawn and then the opposition team ends up counterswapping and somewhere or another 1 of them will win i cant say who.
Its actually quite fun counterswapping, if only because ana doesnt completely counter every tank as much now thanks to teammates and what not.