The last two games I've played, I've rushed out cruisers and both my opponents tried tos spam LRM's and the odd cobalt/deceptor(dunno if that's the right name for the advent equivalent)... If anything it should be the other way around!
Fighters kill LRM's
Cobalts are half decent at killing light carriers
So why are people still spamming LRM's? Use LRMs when you have something to defend them with! ie Flak frigates
With that said though, I really enjoy the new 1.1 version. It gives the need for well rounded fleets. I don't think carriers are OP or need a better counter, for the cost (resources and fleet cap). Capital ships, heavy cruisers and even attack frigates are good at killing the carriers, mix those with flak frigates and I would argue pound for pound it's reasonably possible to stop a carrier spam. Stopping a spam of any kind is actually much easier to perform.
The 1.1 patch will change sins form a "follow a strict build order and click as fast as possible" to a "outmaneuvre and tactically strike the opponent". Before Entrenchment is put in, hit and runs will be a very effective way to widdle away at the enemy. We might see less mass fleets and more small fleet engagements. That will depend on how well people perform at hit and runs and if it becomes a common tactic.
Entrenchment will probably eliminate that tactic though with Flak Gaus guns and Battlestations. This will probably bring back the large fleet engagements. It might, however, create a common scenario where the start of the game will be about hitting economic productiong before the enemy can get a battlestation operational and the end of the game will be about massing fleets to bring down the new powerful defenses. I'd be most worried that Entrenchment will actually slow games down and drag them on longer than they already are.
Back to 1.1, has anyone tried using the Akkan's computer ability with flak frigates? (increased range and chance to hit). I'm thinking if you mix an Akkan with 10 Flak frigates, they'd be quite effective against a fleet of carriers. Level two ability gets 10% range and 8% chance to hit? I'm thinking that would equate to 8% more damage against fighters/bombers and giving a much larger area of cover. I think I'll try it out my next match if someone sends too many carriers.