For me, it's totally destroyed the experience. When fighting CMDRs with enhanced weapons, every fight basically ends with one of us losing thrusters after a few minutes and sitting there waiting for the other to pummel the rest of the ship until it explodes.
Not had a single fight since 2.1 which ended any other way, regardless of what else is in the build of either ship.
I used to play at least 5 times a week, now I log on maybe once or twice every two weeks. I tried resetting my save to bring in some excitement and - while it was interesting for a short while - that's lost the shine too. All I can do now is wait for 2.2 beta to see if there's enough interesting content there (or the 2.2 drop, with aliens) to make me bother.
I bought Horizons for the Engineers, because it seemed like it was the answer to everything I thought was wrong with the game. That's true - it did fix all those things, but it also broke it completely in other ways. It would've been perfect, had it not been for the special weapon effects, which essentially just remove all skill elements from combat.