I'm confused. How is extra retainers or Fantasia potions = P2W? If the extra retainer is going to be used for ventures, well... you'll only be doing that oh so much and if SE are "smart", they'll have the venture use Leve allowances. So unless you have all crafting, gathering and battle classes levelled to 50, I'm pretty sure everyone ill be careful to not spam venture.

If I'm entirely missing the point, then I'm sorry. I honestly don't see how buying an extra Retainer and Fantasia potion = P2W.