Kaon is a pain sometimes. It's a rather long FP and not much to skip. I don't think it's a T2 flashpoint. But true, it's harder than the others, but not because of the bosses, but for the trash. I hardly remember a wipe to any boss there, but bunch of them to a mix of Mercenaries, Screamers and Hunters.
And tanks don't like this FP. A few weeks ago, 3 tanks in a row quit the group as soon as they saw it was kaon
I think kaon should be a requirement to queue for EV or KP because of all the caution you need dealing with mobs is similar.