At the very least, I have seen others things that worry me in regards to p2w, infinity gear however is not one of them.
Such as ?
Odians / Runes ? I don't think they will be more p2w than infinity gear imo.
The ratio "stats/investment" is absolutely outscaled inbetween infinity gear and odians / runes, did you see the numbers ? Even with 0.001% success, there will be someone crazy enough to get all his piece of infinity gear at +7/+8 and absolutely smash any other player in PvP.
I mean, in Korea at least (in EU there will be some Behold and other Sonosmanli "only", hopefully).