You can use missiles against riders in this mod, did you notice? Missiles always hit!
Though I think it was intentional to make riders the primary combat vehicles; highliners are just too big and bulky
I would like to see someone make some shipsets with Highliner pics... maybe Highliners should be added to the next NeoStandard Version?
I took Colonizer Hostile to mean colonizer for colonizing hostile environments. If you look at the colony modules, the non-native colony modules are twice as big as the regular ones, so they do fill up half the Colonizer Hostile.