It is a huge nerf. FEC became vulnerable to Shadowstrike. Terrorgeist cannot freely fly through the battlefield directly killing everything it wants. I presume, it is not auto-include now. As for double-attack on death, it is still better than ASF. And it requires more CP, which is harder to gain after CP-spam nerf. With point increases on top of that, I view FEC going from completely broken to simply overpowered.
10 points increase to spammable unit is also huge. Look at skinks - they are taken 3x10, but still increasing their cost made some builds unvaluable. 120 plague-monks lists are now 120 points more. Important support heroes are also up in cost. Skaven now have to sacrifice something. WLV is also significantly toned down.