As to the delay issue, while I don't speak for Digidesign, I assume their reasoning went something like this.
The units they modeled were mono delays (and I do feel the models are quite realistic). When using Eleven Rack as a Pro Tools interface, you have access to "modern" stereo delays as plug-ins. When used as a live device, I question how many guitarists use stereo delays - I pretty much keep things in mono for live performance, as I find few venues are set up where everyone in the audience can get good stereo imaging.
To me, this is a different situation from a parametric EQ. Although it's easy to add a parametric EQ in Pro Tools, for live use a parametric EQ can be indispensable in dealing with peaks/dips in the guitar or acoustic environment.
So if anyone at Avid is arguing about whether to add stereo EQ or a parametric EQ, I'd vote for the parametric