While I do work, and could use such system to get some easy money (since my in-game money is really low), it does feel pay to win, while maybe not the best items, you still can get decent enough Items to get through the content. (recently started new character, and if I had the money I would buy the best crafted gear, so I could evade a large part of the grinding.)

As for now I am trying to save up for baby opo-opo (since I don;t have that much time to farm for it) With this system I could get it pretty fast probably, but would I get the same reward feeling from it?
No.
It is that you need to put time in such things 1 way or the other that is making it feel like a reward.
Take the struggle away and you will feel nothing, because you only put some money in it to get the reward.

While the initial idea sounds nice (I really want that baby opo ) I think it will hurt the game more then it would gain from it.

So I am against this.