Iain McGhee said:
I'd hope it's not an error leaving off the Particle Beams (bit much to put out a correction to a correction

). Assuming it's not, I can see why they were removed as the Sagittarius is purely a long-range bombardment vessel that isn't designed to get up close and personal with enemy cruisers. It was built to fight the Dilgar after all. Besides, with the number of Starfuries the EA usually field fighter cover shouldn't be a problem.
I wouldn't fancy your chances going up against anything other than fighters with a 5" weak beam! I don't think putting the beam back on the sagg would make too big a change in terms of the way its used tactically, lets face it, if the beam is re-instated you aren't going to suddenly start going to go toe to toe with enemy capital ships with your saggis.
Similarly from an opponents point of view the saggi is a high enough priority target that you should be trying to knock it out at long range with capital ships most of the time rather than relying on fighters to take it down.
Still you make a very good point about the EA having enough fighters on hand to provide fighter cover for it.