Hello,
We have added default font size and font family options, they're in "Default values" section in the profile page. You may need to clear webapp caches to see them.
As for the padding, we did not add this option, I will give few tips on other ways of how to align
You can copy-paste elements from same slide or other slides (and even playlists), they will be pasted exactly in the same coordinates as the copied element was. You can use button sin the editor or ctrl + c and ctrl + v shortcuts.
You can also select a group of object (press shift and keep adding objects to selection). The group of objects can be also copied and pasted in same slide, other slides or even cross-playlists.
You can move objects with arrow keys, and also hold shift to move objects faster.