Yep... lawsuits must be the focus in this Murphy era, no doubt. I've been thinking and saying that for several months now... and to know that those plans are afoot is great news.
That said, I never completely discount the impact of voters contacting their representatives' offices, especially when they're unhappy about something... and especially if we could summon a tidal wave of calls. The "one-two punch" of facing lawsuits on the one hand and riled up voters on the other could be enough to give more moderate legislators some pause - and make them think, "uh-oh...what hornet's nest has Murphy stirred up for us here?" (Especially if those voters are saying: this has inspired me to campaign for/contribute to your future opponent! ...and similar sentiments.) Besides, if nothing else... you tie up the time of their staffers, LOL.
So, if these various 2A orgs begin filing suits and then issue a call to action to "start calling your legislators" - I think it's a strategic error to dismiss it out of hand! We'll need to leverage EVERY tool in our arsenal, not just one! Lawsuits, donations, phone/calls & letters, ongoing recruitment to the shooting sports - it's all necessary.