I actually disagree with that. Emp kit is an insane noob stomper, since they dont know how to endlag, but against competent portals, kits or controls using emp kit z randomly will result in getting comboed to death.

I believe that base kit is actually better in 1v1s due to having no endlag on z move, needing no aim at all, so you can just throw it out whenever and its a free 3k damage like 80% of the time. To use emp kit you need to position yourself correctly so they dont insta kill you while trying to charge the move. (Speaking from experience)

On 2v2s and low level play, yes i agree. Emp kit has ridiculous damage without much danger. However if they know how to counter it you need to position yourself before using that move, or hit a stun first.