The changes to claims in 1.05e is actually a bit disapointing and a step back IMO.
Right now you can once again claim foreign holdings by giving land to a random claimant, something I consider trivializes things a bit. The prince of Poland shouldnt care I made him Baron of Nowhere, Cyrenaica when I press his claim on Poland... I could live with this though.
HOWEVER pressing the claims of a dynasty member is broken
If Im Emperor and my brother or son has a direct claim on the throne of Sicily, I shouldnt have to give him land to keep him as vassal after pressing it. The tooltip says pressing De Jure or Dynasts' claims makes the claimant your vassal. The de jure part works. Claiming for unlanded Dynasts is broken once again.
If in doubt go back to how things used to work. But the idea way for it to work would be: De jure = claimant becomes vassal. Unlanded dynast = becomes vassal. Landed dynast = stays vassal. Landed non-dynast = goes away to his new realm, gives his old holdings inside your realm back to you who pressed his claims.
edit; ahh I see. They added a "higher_tier_than = DUKE" restriction to unlanded dynast royal claims. Which isn't a bad idea but makes no sense when meshed with the fact you can grant anyone a barony in North Africa and then press any claim and keep him. Still, I see the logic, and its easily moddable. So I guess were essentially back to pre-1.05d.
Ideally for 1.06, landed claimants who's claims to higher titles get pushed should 'learn' to hand over their old lesser titles back to the king who pressed their claims and move on to their new holdings, without a vassal bond, UNLESS they're a dynast or its de jure land, IMO.