@Electra Firestorm : If you're in chapter 5 and fighting armies with 1.000 Thorn Mages, you're way further progressed on the World Map than in your Tech Tree so in that case this is how it
should work. Once the rest of your progress matches your World Map exploration again, you will be able to win these fights too.
For your questions about why balance in a game is important: That is of course because of numerous reasons. To keep a game fun and challenging in the long run, a game simply has to be balanced. Prices for techs and buildings should go up, you should be able to unlock better buildings and units, fights should get tougher etcetera. On the subject of fights, this wasn't really the case before. Just using certain overpowered units could let you win fights against armies 5-6 times as big as yours, which of course makes no sense. Fights were not really fun anymore: It was just producing the right unit, (in most cases) click auto-battle and go on to the next province. We want the game to be more dynamic than that.
At this moment when your game is unbalanced, you can notice it in many little things. The fights themselves are one of those, but also think about scouting costs being way higher than they have to be (therefore costing you triple their normal amount of coins), scouting times being around 3-4 days instead of 1 day, like they should be when your tech tree progression matches your world map exploration, armies you face being way too big (though with certain unbalanced units you could win them anyway), but therefore making way more casualties on your side than they should. These are all little things at this moment. Of course you could say: "But if I want to
choose to pay more, have more casualties, have longer scouting times etcetera, that should be my own choice". Of course there's truth in that, but as I said: These are just the "little" things you notice right now.
At this moment the game is fully released about 1,5 years and there are many more years to come. If we wouldn't do something about these imbalances right now, the imbalances would only get bigger and bigger in about 2, 3, 4, 5 years from now, causing more and more (and more serious) trouble. Aside from that, we have many ideas for new features/enhancements/guest race specialties still to come and although I can't say too much about those yet, a good balance in the game will be required to make them work properly and smoothly. So although we fully realise that it's a big step to "force" players to have a certain balance between their tech tree progression and world map exploration (
and therefore "stopping" their non-tournament fights in situations where this isn't the case), we do this because we know it's necessary to preserve the game's future in the long run. All we can do, is ask you to please give it some time, try to make the sacrifice to temporarily hold off from further world map exploration, knowing that it is for the best, that we wouldn't make you do that if it wasn't absolutely necessary and that this will allow you to play a more fun and interesting game for the next years to come.