Please take a moment to read the entire post before commenting! Thank you!
What am I proposing?
The introduction of some great / impressive buildings be added to the game as new content for all lvls. Think of some special buildings (whatever number but i will use 4 as an example) that the player can build in stages and get an island wide effect when completed.
A total of 4 buildings can be built, one at lvl 26, another at 32, the 3rd at 42 and finally the last one at lvl 50. What kind of buildings you ask? I was browsing the internet and found some pics from settlers 4.
In order: The fountain of a 1000 wishes, The Library, Historic monument and The Military Keep
How would this work?
At every respective level, a player would start a chain quest more like a story of how you come to hear about this building, what advents you must do to acquire the plans and knowledge, pay up materials.
An example of a quest chain: Donate x map frags (this would be to find the location of plans - text wise), do x and y adventures (to get plans and info - text wise), donate x and y resources (for architects and engineers costs - text wise).
Then you get the building. Further quests ask you to construct it (construction should take days and would require large amounts of materials to reflect the importance of the building). Ex: every 2-3 mins a settler carries 1 stone / 1 plank / coal etc. once you multiply the time by the total amount needed you can balance how long it takes to build.
My take is that such a building (quest chain + construction phase) should take at least 2-3 weeks to complete.
Building Effects
again, these are just examples
Fountain - once built it will speed up working rate of your settlers by x% or any other effect
Library - once built it will speed up books / buffs production by x% or any other effect.
Monument - once built it will unlock a historic military unit or any other effect.
The Keep - once built it will increase the attack power of your units by x%
Is this doable and useful?
My answer is yes, it can be done using existing game mechanics. Would it be worth it to construct such buildings? Again, yes, if the reward is as good as the effort.
Any thoughts? Feedback?