I loved the end boss fights in both Ego and FOV. They were rather difficult which I enjoyed. End boss fights are meant to be difficult and one shouldn't expect any different from an RPG which has some rather old school elements. Triumphing over the bosses really gave you a sense of achievement and I really got a sense of achievement when my mage absolutely ravaged Ygerna. The Divine One is no longer difficult for me but maybe that's because they decreased his statistics in the DKS version. I remember that he was pretty hard in the original version of the game though.