Yes, certainly - the map is great, and this tends to be exactly how I operate nowadays - but I don't think this changes the point I was making.The galaxy map does allow you to filter power play by activity amount in the current cycle. It's fairly easy for an individual to see where the effort is being applied and go there to help, without joining a group.
Put another way: if you're following the priorities of big group X which has put 400k merits into a particular system this cycle by throwing in another 10k of your own, does it really matter if you aren't on their Discord and only vaguely have an idea about who they are? It's still a case of "join a big group" (no matter how informally) or "achieve nothing in the big picture".
And to be clear, I think that's unavoidable and within those constraints the current global progress balance seems about right, plus PP2 does allow for a multitude of big groups per Power each with their own (not necessarily compatible) agendas.