Unfortunately this isn't any new information. This is just a different way if you expressing your opinion. It's certainly not any more official.
I see now that our main point of contention isn't really what the scenario entails, but rather it is what our interpretations of what Heavy and Engagement actually do, as well as how target selection works.
- One side believes that when choosing valid targets as a squadron you may ignore Heavy squadrons because Heavy is an active "you don't have to shoot me."
- The other side (which i support) believes that when selecting a target, if you are Engaged, you must attack an engaged squadron if possible (doesn't have to be the squadron that engages you, just has to be an engaged squadron ), therefore the Heavy is the only valid target if the other squadrons you are engaged with cannot be a valid target. This interpretation leans more on the passive wording of Heavy, as "You do not prevent engaged squadrons from attacking ships or moving." doesn't explicitly say "you don't have to shoot me" but it is often interpreted that way. The Heavy isn't the one preventing you from shooting the ship, the engagement by another squadron that happens to be an invalid target is.