Would be great to have more control over the layers of objects–especially groups–or at the least, have them remain in the same order. The “send to back” feature is essential and useful, but far from complete.
I am spending a ton of time reconfiguring groups to get elements back inside them, but most of that is because multiple groups in one location continue to rearrange in the layer order. If they were fixed I would be having an entirely different experience with way more time devoted to design rather than trying to sort out this pesky feature.