More options to toggle in the outliner. As it is it is an essential tool for properly managing large (and not so large) realms, but it tends to get bloated towards the end game, therefore a major QoL-improvement would be the following options for the sidebar:
1. Suggestion: Implement the ability to only view armies and navies above a certain size in the outliner - either give us the opportunity to specify a threshold ourselves, or more realistically, set a toggleable option to view armies/navies but only above a fixed size (e.g. 10 regiments / 10. ships).
Reason: Late game the outliner gets overcrowded because of various small fleets and armies, which I keep around on colonial protection duty, or as a rebel task force, or as part of a carpet siege, and it just explodes when constructing a new army, because, before I merge the regiments, I suddenly have 25 1-regiment armies. I have no interest in keeping tabs on these armies, but if I want to view the armies that are actually campaigning in the outliner, then I have to have these in the outliner as well, leading to extreme bloating.
2: Suggestion: Allow us to toggle a navy-view, where we only view navies that are not protecting trade.
Justification: Same as above, usually, I have no need to keep tabs on my trading navies, they trade automatically, and when war breaks out they automatically seek safe habour, but I cannot view my actual combat-navies in the outliner, without viewing my trading navies also, which leads to bloating.
Also another suggestion, not related to the outliner:
3: Give us rally-points, please! They work like a charm in Vicky2, and their lack just seem to force unnecessary micro.
Oh, and by the way, I should point out that the reason I care so much about the outliner, is that it is already a tremendously useful tool, it would be great, if it could be even better.