There definitely should be categories for unlocking Bomb, Stella and Bubbles (maybe even Matilda if it's possible without gemming) on a brand new file, with no unlimited gems. It would be pretty fun to run, since you might need some luck too here and there.

I do not know if it will be added, probably not after that I do not know what it would do, even if you do not use the application with an infinite amount of energy, gems and coins

idK really. getting to matilda would already need some oob stuff tho and is still meh for me

but i might think it in the future