Despite Deploy Siege Platform being highlighted for autocast, my desolators never actually cast it. I need to constantly micro them to cast it. And microing is pretty clunky in this game compared to others, such as SC2. I need to put my desolators in a distinct fleet to keep easy access to them (since they get all mixed up in the top right tab), and then select them one by one because they turn so slow and I certainly don't want them to break off just to lay down a weak siege platform (which usually does nothing due to starbase invulnerability anyways).