Most of the level 30's on the forums and in game I see didn't. I remember when there were only 5 or 6 champions. Here's a link I dug up that has the approximate dates they were released. http://forums.na.leagueoflegends.com/board/showthread.php?t=639330.
A lot of people didn't think it was balanced because tanks were tougher and tank items were stronger. Generally in video games now in days people like to have as much advantages over another player they can so a lot of people thought just because they picked ranged champions they were gonna win just to find out that there facing a whole team of tanks that soak up all the damage and bum rush the shit out of them killing them at there turret.
Naturally there were a lot of complaints about it and one year they flip flopped it all with a major patch that really gave AD champions the upper hand and made some champions useless. Since then certain champions haven't gotten the attention they deserved due to them being too busy trying to balance the new champions. They always generally made the new ones stronger to bring in money from skins, but it got so bad now that they'll straight up refuse to fix some champions, while releasing ones that are even more powerful.
I just went back to playing DOTA and eventually tried Heroes of Newerth when that came out. They have a system where you can last hit to deny allied creeps and allied heros to stop the enemy from getting any gold at all. If you got good at it you could easily cripple the whole enemy teams laning phase without even killing them.
League was the one MOBA that wanted it to be a little easier on newer players. The problem with Heroes of Newerth was the community, but besides that the heros and moves were much more original and creative. It felt more like DOTA then League of Legends did.
Sorry I went off topic. I'm just a MOBA fan.