Also, question: is there any easier way to get claims other than trying to fabricate one? I know you could use prestige to force a claim in the original game. It's just, it's been 4 years and no dice and frankly, there's not a lot to do.
Click on the specific coat-of-arms for the title and it will take you to the screen where you can revoke and see all sorts of options concerning titles [don't ask how to get to this screen otherwise, I have no idea!], basically, if there's people listed under 'claimant' for any title, be it duke or count or baron, you can invite them to your court so you can use their title claims as justification to go to war and give the claims to that claimant, for a boost to prestige, and an automatic 100-support vassal willing to shovel you money and votes. And your kids. Actually, I'm pretty sure the counts/dukes of Leinster and Connahct are going to write books about me, I mean, I did give them their lands for free after steamrolling the enemies. One of them was all the way off in bumfuck Sweden when I called him to my court.
It's how I took over Ireland without a fuss, it's a pretty simple system once you figure it out. And if you can't find a legitimate claimant for a title, you'll either have to marry your blood into it [matrilineal!] before said person is an heir, which takes some foresight and balls if you're willing to take out a few successors to let your daughter's son take a title from a dead count. A pretty good simulator or medieval politics, to say the least.
Also, I had a really big bug where all of my tax and levy and Imperial laws were suddenly reset to default... I have no idea why. Upsetting, since it took a 50 year reign of The Fat to get my laws how they were.
Also also, don't forget to always upgrade your castles! For about 400 gold you can have a total of 100 heavy infantry, 60 pikemen, 90 archers, and about 120 light infantry added to your levies. My capitol now has a total of 1.4k troops to output, since I rather ruthlessly stole the bisphoric and city and made it Imperial right off the bat to make a foothold.