The shared single galactic background simulation may be a "problem" to some - it's a welcome advertised feature of the game to others. Being able to contribute to CGs and Power Play from any mode are similarly welcome features / problems to different players.
Central point of it all, is that Community Goals and Power Play can be enjoyed and experienced by all. Though one side shouldn't have clear advantages than the other. That's all, pretty sure a compromise could and should be made for that, so it fits everyone's Play style preferences and doesn't sway towards one side or the others.
Of course they do - half of players are of average skill or below. They also told us all to "play the game how you want to" and not "open is reserved for players of superior skill".
Now that isn't the fault of any of the Three modes, that is the fault of the tutorial and I suppose how user-friendly and how steep the learning curve of this game is. They give you a short tutorial and it gives you no real starting point and says "Go". Which is really fine and great! That's how great this game is, its a journey, an adventure. But the learning curve, is steep, but not that steep.
Playing the game how you want however, is something that preserved. Likewise, open is out for everyone and not the elite.
Edit: I also see a problem with Open CGs that involve trading and Wars (Lugh, Banki, etc.) because of how the instancing works and how players choose sides. There seems to be a recurring theme of "Not enough to shoot" or "players joined this side and others were forced to switch sides".
Likewise for most trading ones it seems to be "Lots of pirates be a flying here" "Blockades" and the latter.
Its cool they can escape that entirely, but the ones putting up with it in Open could potentially corrode or desensitize playing in Open. Then you get players doing the exact same things with 100% of the same contributions, but without that extra risk. Adding incentive to taking those risks is what I view is the best solution to that.
Which for some, is the problem for some and for others, enhances the game for them. I don't think Exploration ones and the unique case of Operation: Dullahan ever really had this problem.
(Well Actually, Dullahan had no counter to it aside from either killing players or finishing the other Community goals faster, which was totally cool.)