In Oceanic future research list there are 9 avatars which you can get after completing a research. At the same time you can get only 3 expansions! It would be OK if avatars are useful for something (increasing percentage of some feature), but as only a profile picture they have no purpose and there are too many avatars already. On the other hand there is a lack of space in everyone's city. Every new expansion is more and more expensive and harder to achieve. So my suggestion for the devs is to give us possibility to get more free expansions.