

I. The race of shades.

I suggest you create shades for defensive cavalry, defensive occult and defensive bestiary.
I suggest you create shades for offensive occult.
II. Pictures.
I suggest you rework the pictures.
III. Competition rewards.
Sometimes, we get 2 times more defensive units for 1 offensive unit (48 VS 24).
Sometimes, we get more than 2 times defensive (60 VS 24).
Sometimes, we get expensive defensive (demons) VS cheap offensive (warlock).
Sometimes, we get expensive offensive (necromancer) VS cheap defensive (golems).
I suggest you stop making us go crazy.
IV. Ulrich's blade.
I suggest you remove Ulrich's Blade as it looks a bugged item, isn't it ?
I suggest you offer more infantry and more cavalry in BG's rewards (for defensive infantry, I mean dwarfs and archers, not the 4 weirdos
).
V. Resources and robots.
I suggest you give everybody the way to get resources without leeching some robot.
I suggest you remove robots :

VI. Defensive units more powerful.
We can get up to 1 offensive legendary unit each week + 2 offensive legendary each month :

But... we can't get any defensive legendary completing quests. I suggest you rebalance this.
VII. Nomads.
Nomads cost is 1760 ; nomads defense is 150 (ratio is 1760/150 = 11.7).
Knights cost is 2166 ; knights offense is 240 (ratio is 2166/240 = 9.0).
I suggest you made nomads a bit cheaper.
VIII. Vampires.
Vampires are very long to produce, which make them quite useless.
+ it's very hard to get maranian amulets.
I suggest you make vampires cheaper or faster to produce.
IX. Increase the range of the eagle's nest.
I suggest you protect players from being overpowed in the hamlets. I suggest you bring together players of the same level even after level 60+. I mean... you bring together players of the 60 decade ; you bring together players of the 70 decade ; you bring together players of the 80 decade ; etc.
I know this means free sapphires for very high level players. Maybe, you can decrease sapphires collect speed in the hamlet.
X. Anonymous in the settlements.
I suggest you make people anonymous in the settlements so they don't get powned while hitting a settlement.
XI. Bonus.
Make monsters in dragon's lair easier to kill. The game is kind of... buggy on my computer. It's been a while now I stopped to kill them because it takes too long to kill them.
XII. Double bonus.
Make bonuses usable.
If I activate my dragon to speed up the buildings construction and the lost arts discovery, I lose a lot of points in the developement race competition (-25% points). If I use the increased attack bonus, I don't earn more points in BGs competition. As a result, I'm accumulating bonuses which I will never use.
XIII. Triple bonus.
Make CM stop calling me a lady (my avatar is a lady, yes, I know ; it doesn't make me a lady). Make CM stop double-triple-quadruple-quintuple-sixtuple-sextuple... posting.

XIV. Random.
Create a temporary server which will be regularly rebooted.
Prohibit spending money on this server (book this server for "pro-gamers", book this server for e-gaming).
+ create castle skins without bonus
+ create a super boost so players can discover every lost arts in less than one month.
Give a reward to the best players of the server (I mean on the regular servers).
XV. More fair rewards for the weekly competitions.

Give more fair rewards, like... rewards for top 100 players. Encourage activity, do not encourage cheating. There are always cheaters, everywhere. Nobody can protect themselves from that. I suggest you don't encourage super elitism. I suggest you encourage hard and honest work.
Don't encourage the guy who takes advantage of a glitch. Don't encourage the guy who relocates ten times to beat the others. This is not e-gaming. This is robot gaming.
XVI. Please, change this article title.
https://plarium.com/en/strategy-games/stormfall-age-of-war/pro-players/food-consumption/
The title actually is : "Food: the most important resource ?" As you say in the article, since the update, units will no longer desert while you are out of food, but... the title could suggest the opposite. Do not induce players to the error. 
XVII. Make this game an application (and an executable).
I know there are many secret mathematical formulas that you prefere to keep for yourself, but I feel like it's annoying that we need to download pictures every time we connect to a different castle. Personally, I stopped buying improvements because of that.
XVIII. Create a section dedicated to data collection.
I suggest you create a section reserved for data collection, I mean a section where sharing his opinion would be inappropriate (it would be a bit more work for you, but it would be much nicer for the players).

XIX. Make it possible to accumulate units for years !!
Make this game playable for a lifetime. What's the objective of the game ? Is it to reach the highest level possible ? (135 or 140 or 150...). IMO, it would be a super idea to make it possible to accumulate units for years. Then create more games, and make sure we can move our units from one game to another. It would be, just amazing...
That's it. All that, these are my suggestions.