Personally, the Duel 2 is a sneaky good head still. I think its a better option than the Duel Reflex and the Duel 3. The Duel 2 feels like a nice "in between" head, where it feels in between an OG CEO and a OG Duel. Hard to explain, but I really enjoyed using the Duel 2 in college with the SNG rules. Other faceoff guys really enjoy using the 2F so the Duel 2 kind of got kicked to the curb. I think if you are looking for a traditionally flexing faceoff head that isn't as stiff as the 2F, then the Duel 2 is a fantastic option.
the duel 2 folds back too much when ur going against a stiffer head so you just get pushed right off the ball in 50/50 i've started faceoffs this year and my first head was a duel 2 and im just now moving onto the mark 2f