This is still a problem. I cannot get my son's PSN sub-account to work with PvZ. What a nightmare. I contacted support, and they said they 'could not find his sub-account', and that I needed to contact Sony, even though I gave the rep the link directly to the PSN web page with his account. He is also able to play other non-EA online games with his subaccount. This is a zero for customer support. They have not fixed this problem in the 3+ years it has existed, and seeming are tone-deaf to even trying.
So, I am stuck having to let him use my master account for which there are no restrictions.
