Well yes... that's what pay-2-win means. Paying to save time or paying to have something quirky that doesn't give an advantage isn't pay-2-win.
If it isn't giving an advantage over non-paying players then whatever is being paid for is just a saving of time. I'm not going to call it pay-to-win if someone uses real money to buy the same Mech as me even if it did save them a few hours grinding, and sure as hell not if they bought a Mech worse than mine.