Contract grouping with live tiles was a good idea and is now available in 1.2, but it took way longer than I wanted to implement. I think I will have to take a break after this big update!
I decided against forcing it for all escalations, so the content pack needs to explicitly request it. I updated the unofficial pack to do so for the escalations with more than one level.
I also added an option to merge elusives into each sublocation, but you can of course keep using your approach as well. See readme for details.