I suspect you guys, as forum regulars, are more toward the hard-core end of the player spectrum. I understand you want complexity if it gives you more options / choices. But one of the main goals for the UI re-design was to try and simplify things were possible, so the game would be bit less complicated for people who have never tried CC before.
I think the team-borrowing was more important in LSA, where the situation was very fluid and BGs would frequently be attacking from multiple directions. And historically you had the Germans throwing in units piece meal, so letting them decide where their few tanks would go (and being able to shift that tank support around) was important as well. Panthers is much more about two armies meeting in a head-on bash. There are a lot fewer situations where multiple entry zones are in play, and there are no odd-ball tank-only support BGs to deal with.
The feedback during the re-design was largely in-house, and though one of the long-time beta testers did comment on the change to this area, there wasn't any great hue & cry during the beta either.
I appreciate your feedback and it's something I'll keep in mind, but it's unlikely that we'll be adding major new features to Panthers in the Fog at this point.