While I appreciate that research is required to open more difficult quests, I often have no idea what lairs were just made accessible by doing so, meaning I could enter a lair of epic difficulty without being aware. Don't get me wrong, I already know that you can hover over quest related combat areas and see how difficult they might be, but other quests, such as searching through caves, provide no indication.

Something as simple as listing "This quest was opened by 'Bretons Letters'" when I hover over it on the map would help a great deal!