just a few, 

general

- get rid of small x'es used for closing various things

- when providing army strength add relevant information - top attack in the army, and top defence in the army, totals are unimportant usually

main map 

- the track list on the left side, usually get's under description of the unit/city/whatever (in the bottom left of the screen), I cannot see all the cities (and I cannot see the Zzz)

  - move the detailed descriptin a bit to the right so it won't cover the track

  - allow grouping cities in two or more columns

  - allow filtering of units by pioneers (if present), normal armies, garrisons (units guarding place or outposts but not in cities), hero armies, sovereing should be always on top regardless if in city, outposts need a special group too, preferably under cities they link to

  - the list never fits in the screen anyway (once you get past few units and three cities), it's okay to have the icon bigger (like twice their current size) that would make them actually clickable without straining eyes, and give more information (top attack, top defence in army)

  - allow hiding the entire track list with a single click, 

- minimap is useless, for anything except the continent sketch, especially on the large map, it need to be zoomable, it need to clearly identify hostile units

  - allow more option there such as ignore the terrain type, show only POI and units

  - allow filtering which players should be visible (during wars, I'd like to see only my own and enemy units for example)

  - mark with larger dots units of greater strengths

- hostile units need to be reported not only within cultural borders, but also nearby the cities/outposts

- merging armies need complete overhaul, dedicate a window to it if you need to

- drag and dropping production queue works but is cumbersome due to small icons and not hints, on how far is enough, allow production queue management on the city detailed view

- allow units to continue their movement, without needing to end the turn with a single click

- long enchantment names overwrite themselves in city detailed windows

- add information on city essence (and available enchantment slots) currently you need to enter the city details

- city level up window cover the map, I don't know what I am leveling up after I have ten cities, move that to the bottom left tab, or require to enter city detailed description before ending turn, but don't force it on the turn begining

- add option for camera to trace all ai movements within cultural borders after turn end

cloth map

- show spell casting effects on cloth map, something to confirm a spell was successfuly casted

- more information on hover

- allow filtering such us - filter strong armies, filter undefended cities, filter weak quests

- make field yields (material, essence, grain) greater

tactical map

- allow cloth map on tactical battles

- show movement path when right clicking to attack

autoresolve

- allow setting behaviours for units in autoresolve - ie. I usually don't loose weak units that gather experience, by keeping them safe, autoresolve usually losts them, if I could check - avoid in combat, so that units get attacked only when all others are dead, I wouldn't have to resolve all of the combats manually, similar for archer units, the logic is there, just allow tagging units that way.