One argument is, they should justify their price.
It's their product to sell as they see fit = justified.
One argument is, I don't want to pay it.
That is your choice. Nobody will force you to play.
One argument is, I can't afford it.
Sorry, but it's a luxury. Not everyone can afford luxury items.
One argument is, they are stealing from me with this P2P option.
No, you are choosing to buy the game with the contract of paying the monthly fee to play it. If this seems unfair, don't buy it.
One argument is, P2P will ruin the game.
If you want to believe that, all the evidence in the world won't change your mind. However, ZOS took a lot of time to decide this, and it is their risk to take.
One argument is, F2P/B2P is just as good an option, if not better.
Sorry, but ZOS disagrees. Again, there product, their plan.
One argument is, ESO will lose a lot of customers, if it is not F2P/B2P.
Well, apparently, they will only lose people not willing to put as much money into ESO as P2P customers. Also, they will be gaining customers as well. These customers will pay to play, so good for ZOS.
One argument is, ZOS will make less money with the P2P plan.
If you look at the math and still believe ZOS is loosing money with this plan, no argument is going to change your mind. However, ZOS did it's homework and feels this is the best plan for them.
I can't think of anything else. Have a nice day. 