Styles/assets still need a lot of work but one feature I'd like to see added sooner rather than later is the ability to based one style on others like you can in InDesign. Make them better if you can because even ID's "based on" feature can be improved.

Basically what I'd like to see is the ability to set a style (body copy for instance) and make separate styles based on this for perhaps different colors (white on colored box for instance). If I need to change the size, font, and/or style I would do it in my base style and it would cascade through all the styles "based on" this one.

Where this can be improved is perhaps on the presentation and/or ability to set a truly global master that is easy to see what has changed between the instances. My initial thoughts are to have a nested appearance to these but that can get messy and/or complicated quickly because I might base things off a nested object.