There are some misconceptions here - this is NOT play to win. Do you have to spend money to buy the game? Yes. Beyond that, questing is all you need to do. I have probably 5 - 6 epic weapon schematics. I'm at about 15 hours in and crafting new epic weps is no problem. .
That's an ironic typo right there - it's true, it's not play to win ;p
People are generally pointlessly argumentative about 'pay to win' as a term, with some people even a giant flashing button that literally says 'Insert credit card details and win the game ! Comes with free exclusive victory screen' wouldn't count.
Let's take the checklist challenge, and then anyone reading it can decide for themselves.
Can pay real money for cosmetic items : check
Can pay real money for xp boosts : check
Can level up items and characters directly with currency : nope
Artificial time gates to playing can be unlocked with currency : nope
Can pay real money for exclusive characters : check
Can pay real money for exclusive items : check
- Those exclusive characters and items are cosmetically improved over normal : check
- Those exclusive characters and items have a functional advantage over alternatives : check
- Those exclusive characters and items have a significant functional advantage over alternatives : check
Has a "premium" currency bought for real money that is the only currency for upgrades : check
There's no unrestricted way to gain premium currency without buying it ( i.e. drip fed from non-repeatable quests in carefully metered dose for maximum real money conversion ) : check
ALL the top tier items are bought with premium currency : check
ALL the top tier characters are bought with premium currency : check
You can't buy anything directly, everything is spinning the slot machine : check
To me, 12/14 puts is squarely in the dirtiest tier of exploitative mobile games- you can make your own decisions.