One of the things that Yoshida told about that possible role was about the weight put on the 1 DPS shouder if they create it.

But, I was thinking... Imagine if instead of 1 Tanker, 1 Healer, 1 DPS and 1 Support, we go for 1 Tanker, 1 Healer, 2 DPS and 1 Support? The regular party will be composed by 5 chars in place of 4 and full parties would have 10 chars.

Is this possible? I don't know, but I kinda like the idea if it does.