The is more than enough power. However, if Ford announced it with 650hp everyone would still complain that it needs no less than 750hp...then 850hp...and so on.
You do not even have to tune a current V-6 to get actually a bigger number... Not sure if you can believe everything on the interweb, but the producers of some of the plug in boost claim 30% gains in HP which puts 330 at 429 hp... Now, can the undercarriage handle that in a stock truck, I have no idea.
I'm not even sure why I would boost up the HP on my truck right now? If I wanted to go fast, I would have kept my Focus RS with a tune.