I'm not sure what scouts do in ACTA. I think they give dice re-rolls or something.
Seven is a lot. Federation, Kzinti, Klingon, Romulan, Gorn is five... Tholian maybe, that's six. Orions don't really have dedicated scouts, but maybe the seventh? Or perhaps multiple scouts for one of the "TV Empires", Roms, Klingons, Federation? We'll know soon enough I suppose.