Hi @Guaca,
From your feedback I guess you are new also to the forum and did not took a look in all the discussion and other player feedback for the current and other alpha testings.
Well, just to save you a bit of time, all the points you indicated will be gradually be covered in the future developments phases.
For the Alpha 2 - Test 3 coming in June they plan to deploy player cities which will considerably populate the maps and created many points of interest.
The bestiary is not complete, constructions decaying will be coming in the future iterations of player cities and constructions, and many more things.
All that said, don't worry they are just in alpha testing, there is still more than one year worth of development. In the mean time, you may want to go on and read all the Design Journals at least. Maybe watch some of the Q&A streams, etc.
Ciao.