I was going to suggest that you read MC's post in MaxAstro's thread but you beat me to it. Here are some things that you didn't mention that I really liked, I wont post more because you already read it.
5. I might change Caves of the Ancestors to sometime randomly give out channeling 1 or 2 (and maybe Arcane) to units built there.
7. The Towers will get some sort of bonus, perhaps access to level 4 spells (one for each tower?) an a little free arcane xp. The Tower of Mastery (should no longer be a victory condition) will give out channeling III on move, which could make most Amurite units essentially archmages. ideas for spells ->
http://forums.civfanatics.com/showthread.php?t=293748
I really like the idea of changing mounted and archery lines. They did seem kind of strange from vanillia. I like the archery changes the way you have it, and have a suggestion for the mounted line.
chariot -> horseman -> specialized mount -> Armored mounts
or
chariot -> horseman -> horsearcher -> specialized mounts (probably this one... it fits better)
1. specialized mounts can be war elephants, horse archers, and new mounts like bore riders, griffon riders, drake riders, cammel riders, knights, Lancers, pegasi, raptors(dinosaur/lizard mount), ram riders, deer riders(elves), and others, if you go with this idea, then ill expand this more.
2 depending on where in the line you put these, armored mounts can give national units and added defense.
3 mounted line could get flanking ability against all ranged (archer)units when out in the open (not in city) - maybe at the 3rd or 4th tier on the line - (this would actually make spearman a critical part of an army)
Aside from the new stuff, I have some feedback on patch b. Im playing an marathon game so i know its my fault if im impatient, but with comparison to tech expansion and fort upgrades I think they are too slow. I think keeps should grant cultural borders and castle commanders should get special abilities. Waiting for the expansion of borders for castles is painfully slow if you are trying to collect resources. often if Im trying to get copper that appears out of my border (waiting for fort/keeps to upgrade) I am already collecting iron and on my way to mithril by the time it becomes a castle. So if the upgrade speed could be increased a bit and if keeps grant borders that would be helpful.
Fixing the xp will help fort commanders, but I still think as they upgrade they should get more special abilities (if you agree I have made some suggestions in the past and I could make more)
EDIT: one quick last thing cause I keep forgetting... could you make blizzards castable for illians, so you dont have to always hunt them down?