Its not a bad idea, but keep in mind the pyramid can be opened before Schala disappears.
Oh some other stuff I forgot in my list of changes
Under new content is the Reptite village, I felt their entire territory should not have been limited to one castle, plus the 65000000bc map was a little empty, so I turned the Reptite territory into a full village.
Not sure what sub-heading this one falls under but I made it so the password must be retrieved from the right side of the factory before the generator could be opened, I thought it was a waste that most players would skip half that dungeon, letting all those maps go to waste.
And under rebalace I made Gato strong enough that he cant be soloed at level 1 just by mashing A, he gives the second most silver points he should require you to at least gain a level or 2 and change your armor.