Yes, that's partially true, though I have never heard of Lucas having trouble and thus bringing in Spielberg. He did that because he could, not because he desperately needed help. In general, the situations aren't really comparable. Reshoots are common, and they are planned in advance as well. ROTS had some pre-planned reshoots that ran according to schedule. TFA had them as well. Rogue One had regular reshoots planned, though in the end they needed to postpone and extend them quite a bit. Han Solo now has extended shooting as well. Having reshoots is not a problem, there is always some stuff that comes up that needs a bit of tweaking. Having much longer reshoots than planned, and bringing in additional people to lead the effort, is not part of that. In the end it is the final product that matters. Rogue One turned out great, so there is little reason to complain about extended reshoots. From an outside point of view it is hard to say whether what is happening is good or bad. It could be that these decisions are stiffling the creative flow, or it could be the complete opposite, and these decisions are all necessary to protect the integrity of Star Wars and to deliver good movies. As long as the finished movies are popular and bring in a lot of money, you can't really say that the approach is wrong. Though you obviously need to be careful not to burn through too many people, else you might end up in a situation where many talented writers and directors don't want to take the risk anymore and avoid working on these projects.