Nope, basically every change aside from the higher res screen made the s6 WORSE than the phone I already have. The buttons are placed awkwardly on the right side, the microSD slot is gone so I have to pay more for the phone to get the same storage I had in my S4, the removable battery is gone, and the Sprint version doesn't let you talk and surf at the same time because they removed one of the radios. The S5 seems like more of an upgrade to me.
I guess I'm just going to get a Note 4 when my contract is up and keep it until another good phone with a removable battery and microSD slot comes out.