What would make sense is a combination of broad bills to keep the opposition occupied, and laser focused bills to correct very specific problems. GOAL has had some success with the later (for example, shifting LTC validity from 4 to 6 years), but has, to the best of my recollection, never had any real progress with any sweeping reform bill.
Similarly, Comm2A is targeting very specific situations, rather than filing "feel good" suits aiming to have huge sections of MGL ruled invalid en-masse, as the later approach would be doomed to failure.
The "felon with gun" prohibition is an example of how once a particular form of gun control gets ingrained, it becomes "unthinkable" to even challenge the prohibition without looking like a kook. It would make far more sense to limit it to certain violent felonies (I doubt someone convicted of insider trading, running a pump and dump, or trying to sell a senate seat is at risk of using a gun unlawfully), however, the societal brainwashing is so complete that even GOAL dare not challenge the now mainstream view on this one. A similar concept exists in Canada/Australia/England, where even suggesting self defense is a valid reason to own a gun results in immediate loss of credibility with the vast majority of the audience in any public argument.