Text expression control
I'd love to see a "Text control" option for expression effects, where it would add a blank text box in the effects panel that a user could enter text in to be used in expressions, along with properties for text layers for things like font, alignment, leading, etc. that could be controlled via scripting.
Johnathan Geary commented
Similar to a slider controller, and injunction with essential graphic elements, I hope that someday we'll have a text box (similar to an HTML textarea) as an effect to be able to edit essential graphic source text with ease. It's already pretty busy with keyframes and layers below, it become more of a hassle to have to manage titles for text animations in the composition as it is currently.
Sean Cardwell commented
I think this is extra important with Master Comps, since the only way to edit text setup in them is to right click and hit edit text, and use the dialog box, which is rather slow/tedious.
Right now I just setup text to pull from the name of the comp with an expression, so it's quicker to version, but that's still not ideal.