I think a higher gun price is good - but the way it is now (and though I haven't checked exactly) it may be cheaper to buy soldiers and get the guns free. Even a veteran soldier was only about 50% more than the guns that he came with in a quick game that I just played.
My other comments are mostly aesthetic.
1. pirates don't seem to have any greeting text, and the new factions use the "don't call me late for dinner" line, which is odd when many leaders use it.
2. The europe screen scared me at first, but then I've grown to like it. However, I don't like the picture. I opened the file and put a glow on it in a simple editing programme
http://www.yourfilelink.com/get.php?fid=479898 and I'm using this version because I think it seems less intrusive.
3. I've noticed that the europe screen seems to change depending on the season, that's pretty cool - though it didn't seem to always change. Could this be because I used a custom game speed (I added 50% more turns in the normal game without changing anything else except the month increment from 12 to 8, I just wanted to have less time pressure)
4. the AoD title page seems to be a bit lower resolution or maybe suffers from compression, but maybe that is because I play on 1920x1200 res?
5. I'm not such a fan of the cut scenes, mainly because they are full screen and not a little window like the achievements. Is there anyway to turn them off, or do I just live with them for now?
Great mod, I do like it a lot and could never go back to playing vanilla.
[edit]
6. dragoons get a bonus when attacking cannons, do they get a bonus when attacking artillery?
[edit 2]
Re: point 1
I've edited CIV4GameText_DiploTexts.xml to include:
<Tag>AI_DIPLO_FIRST_CONTACT_LEADER_HENRY_1</Tag>
<English>Hello, friend. My name is [OUR_NAME] the Navigator. Why don't we sit down with my cartographers and compare charts?</English>
and
<Tag>AI_DIPLO_FIRST_CONTACT_LEADER_SOUSA_1</Tag>
<English>Hello, friend. My name is [OUR_NAME], great commander of the [OUR_EMPIRE] expedition of the New World. </English>
can anyone who knows what they are doing tell me if this will work (is [OUR_EMPIRE] the correct tag to use?