And G: - some minor improvements to relations/diplomacy
Could this include reverting the current situation where it's possible to recruit same-race cities for free? Either by reducing same-race relations or having a cost (doesn't need to be full cost) to recruit even at Friendly relations.
This free recruitment screws with the balance of some maps that were made under the understanding you wouldn't be able to recruit cities for free, and introduces the absurd tactic of letting an insufficient enemy force take your own cities so that you can recruit the resulting rebels for free.
And G: - level-independent hero upkeep
I don't think it matters too much what upkeep heroes have, as long as it's not huge.
But, level-scaling made sense in terms of gameplay and balance - a more powerful unit costs more to have. I guess it annoys you for thematic reasons. Personally I was used to gold-hungry heroes from Master of Magic, a predecessor game where heroes have more of a mercenary tinge.
On the other hand, I like that they don't demand gold upfront any more, because my RTS habits always made me spend all my gold, and I don't know if there's any way to tell what the hero arrival chance is, should you stockpile gold.
And G: - FM/WW castable on machines again, but more expensive
Very nice! So you can make certain enchantments cost more on certain targets? Could have other applications.
And G: Currently, the bonus when migrating is 20 points which is equivalent to one status shift, and it will definitely stay that way; what I am unsure about is the bonus for looting which is going to be either 20 or 40. Preferences?
I prefer 20, I don't think the rescuer really 'deserves' 40.
And G: 3. I am quite surprised that I have not heard a single complaint about the increased production times for L1 and L2 cities. No demands to revert this?
I like it for hamlets, for villages I am not so keen, but it's okay. Could villages be made cheaper/quicker to upgrade, like in Warlock's mod? And Cities more expensive/slower to upgrade?
Villages (2-hexers) have always felt a bit wimpy to me,
And G: 4. Azracs are currently somewhat disadvantaged by their default relations which are Wary or worse with all non-Neutral races. If anyone has any suggestions on how to improve this, I'm all ears.
Off the top of my head, I can't remember why they couldn't be Neutral to Goblinms, Dwarves, Halflings, or Dark Elves, but I don't know the lore that well.
And G: 5. Any other (minor!) tweaks that would be needed for a better multiplayer experience?
I wouldn't use AoW+ for multiplayer, I hope you make a multiplayer version. Hero development should ideally be way more rapid in a multiplayer match of 1 map, as compared to along an entire singleplayer campaign of ... is it a dozen scenarios? Then there's rebuilders and same-race city recruitment but I've whined enough about those.