Triple talent customization

We need a third talent tree spec ability as i am a paladin but want to use all 3 specs but cannot u guys should make it cost like 10k gold for third or only donors can have for free (makes people want to donate more if they haven't already i really want to run triple spec paladin i already have the gear to do so but switching talents seems like a waste of time when you could press 1 button instead of running back to a trainer every time u want to have the talents to do a certain spec please give us favorable response of yes we will do it for you donors who graciously keep our servers afloat and workers paid
P.s. we love you

Custom content, which has never been meant to be a feature in wow.
On top of that, this feature would require creating additional patch - for player UI updates etc. I really don't think they will work on this anytime soon, especially without big enough reason. Last but not least, for people using 3 specs this would remove another intended feature - cost for changing a spec - which is there for a reason.