Still pointless. People who waste upgrade time on buildings that have no long term value generally struggle to increase IPH because that path leads to cheap upgrades with no significant increase to income. The store buildings worth having come with long upgrade times and upgrade costs that, while not cheap, are very inexpensive compared to LTB upgrades.
It would have to be done in such a way that doesn't completely devalue the existing money buildings. Seems very unnecessary when Gree can just make an LTB that suits whatever direction Ms. Davis decides the game should go.