While sounding nice in theory, these sorts of regulations will certainly curtail innovation while providing very, very little value elsewhere. If people wanted removable batteries in their phones, they would buy them a lot. They don't.
For that to happen there obviously needs to be a supply worth writing home about. Furthermore, speaking purely for myself, a removable battery is not a must but a nice-to-have. A lot of slabs that have removable batteries are out of the game for entirely different reasons.