For stations it is (near?) impossible to set up multi-tile animations using triggers which are only happening on platforms "where the train is" (bits 3 .. 5), since the animation will only being run for those platform tiles. Since prop18 (animation triggers) is a WORD and only 7 bits are being used today, it would be feasible to add those three platform-restricted triggers for the whole station as well?
Although this would be nice to have, it isn't something we expect to fulfill in the next year, and on that basis I'm closing it. We do this to keep the project manageable, productive and fun. We hope you do understand. Thanks for contributing though! Here you can find more about how we handle feature requests.