I think the point being made is why remove these plots/features entirely rather than refine and reform? Then again assassination, I didn't miss the removal of this button. I wasted a good bit of time hovering my mouse over the easy fix button and save scumming thereafter.. It's removal cured me of my save scumming addiction.
I will say that the plot mentioned above in the thread (Weaken Vassal Plot) was pretty easy for the player on the receiving end of one of these "weaken vassal plots" to exploit the hell out of it. It was used (or rather i used it) to get some free revocations within my realm by simply asking my vassals who joined the plot to leave it and if refused, revoke revoke, ta ta. Thus instead of weakening the player, it strengthened the player by them being able to remove the haters, bring in the love or just keep it themselves.
I STILL would have preferred it be reworked a tad so it wasn't so exploitable (simple to code, if a vassal would accept a title being revoked then say yes if asked to stop plotting) Which one would think be a pretty reasonable and simple way to solve the exploit and thus keep the plot. That was an easy fix.
Instead it's removed, leaving a big gap in inter-vassal plot actions ie leaving no actions. I think the Fabricate Claim on Duchy plot was also removed if you held a county in another Duchy as a vassal. This was balanced by the player then being susceptible to a revocation plot by the liege (as mentioned in the thread) so it was a bit risky to hold this county personally for a length of time. The plot wasn't available if you landed a vassal there. You had to personally hold that county. Still, it added something to the experience..
One major re-work i would suggest is having the Liege lord opinion of super dukes changed. As a Duke begins to hate a King (above 2 Duke level titles held personally by the King) a King should begin to dislike a Duke who has more than 1 or 2 Duke level titles (along with the fellow Dukes of the realm) equally. This would make the Liege more inclined to start up a revocation plot and other vassals more willing to join said plot (hence making the Fabricate Claim on Duchy far more risky to the player by holding that county personally). At the moment, these Behemoth Dukes in relation to opinion are treated exactly the same as a single county/single Duke title character which is just wrong. They should be seen (especially from a Liege lords perspective) as being a major threat. In reality, you see no reflection of this in opinion vs size.
People may well say, Hang On!! This makes it harder for Duke tier players. Past releases, i'd have agreed but now the marriage game and NAP's were introduced the Player can counter the risk if he's a NAP with the liege or other Dukes BUT that same NAP prevents the Duke from targeting those characters. The more Duke level titles the player holds, the less the liege likes you and the harder to secure a marriage so the player needs to ensure his power is increasing enough per title to ensure he counters the threat better or ally up somewhere else. If it adds nothing to Gameplay it may just enable AI Rulers to better keep vassals under control and prevent Super Dukes forcing faction plotting as easy as they do at the moment.