What's the best way to accomplish something as Littlefinger?
It's easy enough to become Hand of the King / Spymaster / Master of Coin of the Iron Throne. Even Regent. You can even sleep with other women at court and get some high born bastard sons. But then if you can't get enough land, other high lords won't accept marriages with you. So, how can you get assigned titles and land? Like, if I'm Hand of the King and Regent of a two years old king and the title of Lord Paramount of the Vale is vacant, is there a plot or a way to ask it?
Also, I feel that those in the council should have more power, and especially Hand of the King and Regent. All they have at the moment is more power in plots, but that's it, plus some random events from vanilla in which you can steal money from the treasure or you can kill your king, or lock him / her in a tower, declare him mad (he'll become Incapable) and be a regent for life. The problem is that you won't be ruling anyway: the staff should find a way to give more power to Hand of the Kings (especially if the king is an idiot who doesn't do stuff himself) and Regents, to give them the impression they're actually ruling. Maybe give them the chance to ask for juicy vacant titles, give them claims and stuff like that?
As Littlefinger as Hand of the King and Regent with the rest of the Council in my pocket with a two years old king the crown often made decisions that went against my interests and I couldn't do anything about it.