Some of the people saying wait 6 months (or even a year) reeeeeally love to see your games burned to the ground.
You guys do realize games have gone down this route before, only to have lost almost all interest in the game by the time the patch came out due to all the issues. And, had NRS waited that long to actually do adjustments, the exact same thing would have happened.
This isn't 1992 anymore. It's 2015. Developers are much more capable of patching and fixing things at a quicker rate. And consumers know this. Yes, MOBAs run under a F2P model, but they are a clear example of what developers of competition-based games should be doing with their games post-release, whether the game is F2P or not. Continuous and frequent support. It doesn't have to be as frequent, but at least frequent enough to show they're still caring about how their game plays.