Condition improvements for train stations

Please please PLEASE give us the options to use AND or OR conditions for enabling train stations. As in, making the Request Train conditions just sliiiightly more advanced would quite frankly add much more depth to train lines! Give us the option to tell a station to request train only if All Modules full [AND] Station X = requesting train. Station X could then for instance being set to request train if All Modules Empty.
Doing this would allow us to make BIGGER trains that serve multiple different resources instead of having a single train for each resource. Like it would be such an amazing feature, that isn't possible right now due to trains getting stuck at stations due to not being able to empty themselves. And I don't think it would be that complicated to code either!