I'm always up for something mindless!
At a guess, they may be setting up the end of "magic", which is something that fantasy has done before. There is a time when miracles happen and wizards walk the earth but that time passes.
The big argument against that as a structure for the next two (at least) films is that fans love the Force and getting rid of it would be unpopular.
And if you get rid of it, then bring it back, it's a bit anti-climactic.