We don't know the proc rate yet, 5% for 12 seconds is laughable if it procs like every 2 minutes compared to steady 1% haste/crit or orc/troll racials.
pushback only matters for pvp and maybe questing (only autohits pushback in raiding and mythic+ to my knowledge)
Also im no pvper but is it that strong? sure it can make the difference of getting your sheep/cc through or kicked but only pretty rarely, compared to orc stun dr or human emfh this seems not that strong.
I think the pseudo blink is the make or break against melee.
However im anyways a supporter of making racials way more interesting but shuting them off in any instanced content (for the current addon) so they only matter in the open world.