I think the F-14A Upgrade, F-14B Upgrade, and F-14D would be their own complete module. DFCS, EGI, MFDs, PTID, CDU, all that fancy stuff is on a whole 'nother level of tomcat. The F-14D would be such an unstoppable force in DCS. Maybe the F-14A and B Upgrade could be an actual module upgrade like the A-10C II, but the F-14D is on a different tier. I like the aesthetic that the pre-DFCS-PTID tomcat, it makes it feel much more responsive and cold war era based.