No, dukes are too untouchable. The protest mechanic is a reasonable limit on them. A royal duke can be protested out of the duchy, if not the royal status.
I agree with Zakky, this just puts extra abuse on the system. The special taxes are perfect and I agree even with removing the royal status as well. I've always been an action of more intrique with Dukes (as I think my actions have shown as well), but I disagree 100% with protesting Dukes out as well. The same with protesting Lords out, that should not be done. If the above two are implemented, that should give enough fire to 'fight' Dukes to begin with now.
And I say this not because I fear losing my ducal positions, because I only have 1 left and he would never be protested out as he's very loved within his own realm. I'm saying this because I genuinly feel this would ruin the game to quite a certain extend, especially for smaller realms.
