cant remember the last hero i played but her are some that are noteworthy if nerfs reverted
shaco ( so much stuff has changed, but the two biggest was he used to be able to place boxes while invis and his decieve range why oh why). twitch (much better stats, easy pentas, also his old ult range used to be greater then turrets so easy bds too) jax ( could dodge anything, even towers and nexus turret) tf (global tele at level 1) xin ( could 1v5 easily, if u played xin during this time and didnt penta with him you mustve dced or been afk). lb ( she got hotfixed 3 hrs after release iirc) mf ( better attack animation, stronger double up, bigger ult) graves ( so much burst and tankiness) zyra (was quite strong, hence the immediate nerfs).
thats all i can think of off the top of my head
Items that were op... locket ( esp on udyr and gragas) pd (used to give dodge)
cant think of any more atm --- xbl: P2K WARRIOR; Ashe only- lvl 99 13 espers 45 hunts 122333- collecting items I heard somewhere that Viera can be impregnated by The Wood.-Mir_Vimes