I looked at the fighter and see 2nd wind regains 5d10hp 2/day. Thought it was still 1d10 +5. At 5th level you get to start with a +1 weapon or something on a list and a few small things like potions.
Also, I was at a convention last weekend and played in a couple AL games. Nobody cared if we had a 2014 or 2024 PC. I know the online thing said to update PCs within 60 days of the book coming out, but it was not a thing. The new PCs are a bit tougher with more healing and such, but con games are rather easy unless you are coming in with a 1st level PC.