I really like the duo runes, seems to make more things happen early in the game and makes mid less intimidating for beginners because they can't go a wrong way when it comes to rune spawns. The map change is jarring to my brain but I'll get use to it. PL seems really good, I haven't played enough against him to say if he's OP or not, but he's definitely not a split push/farmer like he use to be, gravitates more toward a lycan type playstyle with a powerful starting base that scales well into the game. Bloodseeker seems a little bit better, don't know if he'll be picked often in the end.
Also ET's agh is insanely good. 6 seconds is an eternity for carries to be disarmed and it goes through bkb. I'd count on seeing him more often.