In the original release of Khitomer Accord, it was fun and not too frustrating or difficult (even if the ground is still a zerg-fest). It at least had enjoyable parts including the first space battle, the final space battle, and the shield room.
Now with the changes to spheres, the initial battle is near impossible for my group. We might be able to complete it with different abilities and weapon types, but we don't want to have to respec our characters and ships just to do one STF run. The problem is that the Sphere are ridiculously more powerful now with their own form of a feedback pulse and more frequent/powerful tractor beam, more DPS, more hull, etc., etc.
Cryptic, stop fiddling to boost the difficulty of STFs. It's annoying and counter-productive.