The 3-3-5 has become increasingly popular the last 5-6 years. It plays into our strengths with the current roster make-up, especially when Tyler Brown returns from injury.
My guess is that Phil likes the idea of having two essentially CASH players on the field at the same time, which is more than doable given that we have a few players on the roster with really good size/speed ratios - Ries, Weisskopf, Mota, etc.
I doubt Phil would feel comfortable using them, but some of the young guys would fit into that scheme as well, such as Julian Manson and Darion Jones. Jones in particular stands out. He's a hell of an athlete but also mature and smart beyond his years. He no doubt will play at the next level, and hopefully we can work him into more and more playing time as the season progresses.