I've only been Lynx for a little while and I'm already liking the scenario much better. The gauntlet of bosses skyrocketed my level so Lynx feels significantly stronger than Serge despite having the same stats, and frankly, Lynx starts off with the ability to build a much stronger team than poor Serge does if you make too many bad choices like I did. Harle lacks Kid's Pilfer ability, and it's annoying she's the same element as Lynx, but she is a much more competent fighter and her two personal Techs are extremely good.
Sprigg always surprises me, and she's a far better example of a novelty character done right. She's not annoying and she plays uniquely with her shape shifting skills. She's an interesting take on Gau honestly, and it's fun keeping her in the party to build up her monster repertoire despite my favorite monsters being relegated to NG+. Radius is also much better than I give him credit for, with the exception of his low health, he can take and dish a good beating. I'm starting to think the Devs were bias in regards of the Green Element cause it just seems to me like all of the game's best or most interesting party members share this element. Karsh, Glenn, Radius, Razzly, Sprigg, and even that freaking Turnip are interesting and damn good party members.
I'm off to Termina, but I'm stopping by a few places to gain more doppelganger forms for Sprigg since I forgot she learns the form of any monster she beats. The Forget-Me-Not-Pot simply allows other characters to do this for her as well.