I think part of this is the ease of setting the size. Right now it is manual for every card. A toggle would be an easy way to quickly size and align cards you want to be the same size. This could be similar to the way we can use the last connection type, or how you keep the same card color if you hit enter on a card.
Another feature that would help is alignment options for resize. That is, select a bunch of cards and set all their widths to be the same.