So why is this?
Well obviously there are two contributing factors, the players and the developers, there is no one person or people responsible for this.
We whine about one weapon people are using to effectively and is causing us pain because we are not able to counter it effectively. So the developers tweak it to appeal to masses, while not a bad thing, can lead to MetaBuilds. Or the developers feel that the speed of certain projectiles or energy weapons are to fast so they change them in order to facilitate a better play experience.
Which again isn't a bad thing but can lead to exploits and so on. The fact of the matter is, I don't care about Meta builds like it seems the very vocal public online here seems to. If anything I challenge myself to challenge the Metagame and have not stopped playing because of it. (Although I will say I stopped playing because of the LRMpocalypse when LRM's came in at nearly a 90 angle. I'm sure those of you who lived through that hell agree as to why I stopped playing for that week

Not to say I'm some higher than thou pilot who only plays 'pure' builds. I've tried the Triple Ripple Ilya Build, which was much fun I might add, I've played the 4 PPC K2 build that was popular before the Ghost Heat add on, and still do, I have and love my AWS-8R 4 LRM 15 doom machine, and I would like to play with the NARC once I get a new computer.
All that being said, well the Meta it's our doing, ours and the developers of MWO. So really its up to us in my opinion. We can all use the great builds and rack up lots of kills and points, which is always fun, or we can challenge ourselves into moving away from that and making this a greater game.
Ok....let the discussion begin.