EXACTLY.. And the plan was to show some stuff to the people in charge (Trump's Cabnet ) and get them to vote him out as unfit. It's up to the President's Cabnet to determine if there's cause to remove the President. That's not an illegal method of removing a President... it's part of the constitution.
Just like impeaching the President. You can argue that the HOR did or did not have cause to impeach the President. But they CAN impeach the President. It's in the constitution. They have the right to do that if they have the votes. To say it's a coup is inaccurate, because there is nothing illegal going on.
The 25th amendment scheme was only a small subset of the total plan that took place. The entire Mueller investigation will be proven to have been illegally started along with a lot of other stuff that will be proven to have occurred. Trump has been under attack since before he took office and its still underway imo. I think Durham will drape this all under some kind of blanket conspiracy to commit sedition/treason charge and put all the parties under that charge....thats my best guess at this time, but we will all find out at some point one way or the other.