exactly...."a piece of gear". You aren't going to deck your character in 20 pieces of BiS gear from the AH because it doesn't exist. You can can 1 or 2 BiS items from the AH and even then it won't be the highest ilvl because right now I doubt you'll find a 925 ilvl piece of gear on the AH and you won't be able to deck your character out in it. You STILL have to raid mythic to get the BEST gear. "Pay to win" is when you can get ALL the best gear via money/gold...and you can't....nowhere NEAR that. You can't get your BiS trinkets, tier gear, good legendaries, or even anywhere near your BiS gear list. So, no....WOW is not pay to win as you can't get anywhere NEAR the top with what little you can get. Also, not everyone wants to spend $20 dollars on a token so that they can put it on the AH (one still isn't enough to buy a legendary) to gain a bad legendary and those crafted ones are just that....bad.
People like you see "orange" and automatically think "ZOMG!!!!!" when in reality...a lot of them suck and were infact so bad...that blizzard needed to buff or even redesign MANY of them and the whole purpose of the crafted ones are so you can feel special until a REAL legendary actually drops that doesn't suck.
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How many people have MILLIONS of gold to spend for each run of the multiple the carry's it will take to get you decked out in the best gear?...btw, everything would need to titanforged to be "the best". Also that is up to guilds entirely and there's nothing that blizzard can do about it. So the question is is wow "PaytoWinNow" and officially it isn't and never has been, but unofficially it ALWAYS has been if you want to look at it as a "supply MASSIVE amounts of gold for multiple weekly carries until you finally get your full BiS list". Only a small fraction of a fraction of the player base has the gold to do that so like today and the last x-pac and the one before that and so on and so forth....we still have massive amounts of people who can not and never will get the best gear with the same low ilvl/low skilled player on the forums asking the same tired question "Is wow pay2win"? The answer is still the same...."No". That is why I am likely 60+ ilvls higher than you....because you can't pay to win...but I do raid to win.
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That doesn't make the game "pay to win" and you'd need multiple carries to get your BiS list and 99% of the playerbase do not have anywhere near close to that kind of money. Most of the player base actually has less than 20k gold on their account.