Radious Battle Mod that fixes the pace of the battles and makes them a lot more realistic, even though the tweaks are very simple in nature.
Radious Graphics Mod - removes annoying smoke and dust effects during some animations, might increase your fps a bit.
Radious Campaign Features Mod - increase campaign army/navy and province bonus limits and improved diplomacy (through tweaking the relations conditions)
Radious Buildings Mod - reduced penalties from higher tier buildings. It makes it possible to actually develop your cities with revolts or starvation.
2/4 turns per year mod - it works exactly as you would expect it, your generals will no longer die in 10 turns, but it doesn't affect the technology trees or the time needed to construct buildings. I can't believe CA took such a step backwards here.
Bonus:
Playable Seleucid Faction - they're not completely finished yet, which is why CA hasn't bundled them on release, but they're more than playable, and with a few tweaks, they're a fully fledged playable faction with their own set of bonuses and conditions. Please note that the mod is currently incompatible with increased turns per year mod, but you could merge or do the edits yourself.
It's good to see modders doing the work for Creative Assembly again.