I don't agree with the AK nerf, though it makes a tiny bit of sense with the increasing number of HM dungeons that technically take its place. Pharos makes sense because it was supposed to be on par with the two HM dungeons since it shares drops with them. As for the Echo... you answered your own question. Relic +1s are going to be easier. The Primal quest gets you a weapon of equal level and as such should not be much more difficult. Echo buff can also be cancelled by clicking on it so you can do it old school as well (though I suppose you'd have to get the whole pt to agree or some such). Also notice that the Coil one is gradual. Coil won't see a full 30% buff until two months from patch drop. This is enough of a ramp to ensure that those real close to downing Twin will do so right after patch and by a month short of 2.3 the less skilled players will be able to finally experience the 2.2 battle content.