Rotating Manor levels

With the limited amount of lev 20 Manors on the map, once they are taken, there would only be 2 ways to get one.
1. Take on from another player.
2. Take a lower level one and invest the time/resources to upgrade it.

The problem with this is that once a powerful player gets level 20 manors, they have a LOT of resources at their disposal, and this makes them even more powerful with larger armies, larger taverns, larger warehouses, etc.. The lower level player is then forced to invest even more time into getting to a level 20 manor instead of focusing on building troops and gearing heros like the higher level player.

I would suggest that the manors rotate their levels similar to how the oases do.
Maybe rotate between levels 10 and 20. Maybe to add a level of difficulty, make it random as well. Once it becomes occupied, it would just stay at that level.

Just want to say that this is a (balance) concern of mine as well.

Manors are unbalanced as of now, however will that be fixed when the World Task is reached and all those other ones are unlocked?

Not a bad suggestion by Chicagoguy though in the end it may result the same. Because with oases you have people waiting for them to get higher anyway, and the more powerful players would get more higher level oases/manors/etc because, well, they are more powerful.

An environment where players have to fight over limited resources and assets might be exactly what drives a game and keep it from getting boring too. Also, higher level players (ie. those that have worked a lot to achieve this) might deserve the higher level rewards and it might not make sense for low level players to be able to get what high level players can get. It's kind of like real life in that sense