TL;DR
Update planner in train overview to batch upgrade similar trains.


What?
I suggest to include a new button in the train overview GUI. That should behave similar to the update planner button in the blueprint GUI. If you click it, it allows you to select an existing update planner which ...

inserter's preference is not part of settings but part of its direction/mirroring. Are you manually building normal inserters or flipped inserters? Inserter gets whatever your cursor is when building making this not a bug. It would be easier to explain with a recycler but it behaves the same with ...

yes, please! It's very hard to get an overview of train station priorities currently