I would never use it because I would be worried that I might invite some drunken fool.
Can inviting people with low intrigue stats or traits like drunkard actually backfire?
If not, "invite all" would be a great idea. If yes, an interface where you can mark people and then click a button to invite those who are marked would be great (think of your email account).
Also "embark all".
Adding a filter to the select all button would make it a viable option. I often let plots sit while waiting for the opportune moment, so there would need to be a way to filter out drunks, lunatics, and people with intrigue under a certain value.
As far as army management is concerned, a button to raise a liege levy and simultaneously load it onto the matching liege fleet would make playing the Byzantines much easier.
While we're making UI suggestions:
In addition to that embark all, could we please get a toggle for the selector between armies and ships?
When I want to select a big group of units, I want to select the armies and move them somewhere, and then the ships and move them. But if I drag a group on screen, it always picks the armies. If I want the ships, I have to zoom in and pick each navy out to avoid any armies on the map. I want a toggle so I can pick which gets selected when I drag.
How about an "End all" button also to end all the plots. Would be very useful when you have a large Empire.
I really can't tell you how badly this is needed.
When you have a lot of vassals, plotting among them is a nightmare. Most of them are only worth 1-2 percent. When you need 80-100 percent to get a plot going, and each vassal is worth 2 -- think about how much clicking that it. Open the panel, scroll down to find someone green, click the portrait, click invite. Now do that 40 times.
40 times. Three clicks and a scroll. 120 clicks and 40 scrolls. Each plot.
Seriously. Sometimes I want to plot to revoke a county and I don't do it because my hand still hurts from the last plot. For real.
I can't believe this isn't already implemented.
Maybe we could have a button "select all", then skimming to see if there are drunkyards in our plots. I would like an option to exclude some people of the selection too.
Since this seems to be important to a lot of people, why not just put a checkbox next to each portrait. Then when you click "invite all" it invites everyone you checked. Still a lot less clicking.
And I also second rally points. I mention this myself in every thread it's relevant to. This exists in every other modern paradox game. The code is done. It's more useful to this game then any game before. Why is this not a feature? Put in into the next paid DLC and I promise everyone will buy it just to get rally points activated. Do that and "embark all" and people will buy two copies.