FOX having a terrible year. Did DISNEY overpay ?

Maze Runner did almost $290m on a $62m budget, that's not a dud, Red Sparrow more than doubled their budget so it was a wash BO wise most likely, Darkest Minds yeah cost as much as it made ,but then that's the one big dud they had, not 3.

Also whilst released in 2017 The Greatest showman & The Post made the lions share of their money this year, totalling over $200m domestic between them this year and likely around another $300m internationally in 2018.

You are right their output is a lot lower but part of that is both XM:DP & New Mutants being pushed back, and what with the Disney merger Fox are in that position of nothing they start is likely to see fruition till after the sale finalises so why waste their time doing so, and Disney have some say in things nd have for a while, so it's leaving it all a bit knackered for the moment.

Doesn't matter if things do or don't sell that well domestically anymore, more and more of the BO is coming internationally, the time of movie needing to be sustainable domestically as a priority are gone, so long as the money comes from somewhere is all studios give a shit about, only times you'll get domestic heavy or equal BO's now is if the movies are sold or based on a very American issue or event.