We've made sure to send a lot of the most popular suggestions to the team, and they did mention more customization options in the Year 2 Dev Q&A:
6. Will there be more items/weapons added for customization in PVE?
Yes! We have seen the huge interest you guys have in customizing your Ghosts, so you can definitely expect more customization items to be added throughout Year 2.
What Wildlands could really use to impact the entire map is:
-a revamp of enemy AI behavior
-a revamp of the enemy QRF response system
-revamp of where and how the enemy populates the map outside bases (the environments are just too good not to have enemy patrols in the woods or enemy teams in the snow)