Im sure soon an addon will cover this, at least I'm hoping and have seen the ability to move UI elements is on a few TODO lists for addons such as Wykkyd's Immersion description
http://forums.nexusmods.com/index.ph...#entry12697948.
I'm surpriesed the UI can't be arranged as it seems pretty standard in MMO's these days I'm sure it will at least be in the first major patch.
A few addons here have been based on WoW addons due to being LUA. I've been looking at WoW's moveanything and Blizzmove to work with ESO wth limited success. Hopefully someone with more skill can do a better job.
The other major issue as you mentioned is camera position during NPC dialogues. I have a feeling this wont be adjustable in the addon API and will have to be either a 3rd party program like FlawlessWidescreen or WidescreenFixer, a UserSettings.txt variable we don't know about yet or even Zenimax fixing it (they did mention a FoV slider on the TODO list too)
Sorry not very helpful but this is what I've learned about the problem so far.