IMHO we must look at it from company's finance point of view
They introduced one time income (for them) building which significantly and permanently speeds up entire game progress for the players, but at the same time they were really trying to significantly slow it down as much as possible (with uni, coalitions, more library chapters, generals to level 250
etc.).
The question is why this building was even introduced? They don't make much money of it because to make money in those kind of games is to force players to spend money over and over - in example it would make more sense to let players buy one worker for some amount of time (ie one month) for real money (ie $10) like VIP PLAYER option in other games. It doesn't make any sense to one time sell such a powerful building while at the same time trying to slow down the progress of the players
So IMHO it was introduced:
1. to show better income to shareholders or someone like that,
2. to make bigger bonuses for managers, employees etc.,
3. to raise some more money to save the game from dying and hire some more programmers.
IMHO it was introduced to raise some more money for bigger bonuses because then they were getting greedier
Only after they started to lose too many players they changed the direction to more "fair" approach
But the building remains.
More said - from finance point of view it doesn't make any sense for them to sell this building cheaper They truly don't want players to progress faster because now they really need to focus on some new and fresh features - but those require time to build/test and players are still progressing...
So if it depends on me as a finance adviser/manager I would never give this building for sale and I would actually remove it for additional purchases.