As waffles said before, in game all of it's 'victories' against enemy ships were in situations where any Terran destroyer except maybe the Hecate could have delivered a performance that was at least on par with what the Raynor accomplished. I understand that the Raynor's abilities are supposed to go beyond straight firepower and armor, but we've yet to see them actually demonstrated in any mission (with the exception of the sprint drive), and until that happens those two categories are the things that spring to mind when thinking about it's performance.
A lot of the Raynor's power lies in the meta-rules we laid down, things that are never written into tables but are taken into account when designing missions, setting AI levels, timing jumps, telling the story. This is unfortunate for fans who comb through the tables, but believe me, having put the Atreus in action at full capacity - with its heatsinks and power grid and crew and electronics in mind - it's an incredible, almost absurd platform.
Well, why not have a bit of fiction covering an instance where the Atreus actually demonstrates that kind of capability? The only impressive feat the Atreus displays in WiH, IIRC, is a use of its sprint drive to make two modestly-precise jumps in quick succession. I don't remember even hearing about the Atreus pulling off any feats like the ones you're describing in that post. In the intro cutscene, an entire battlegroup is casually shredding the Comorant to pieces--I'm surprised it lasted as long as it did (which was already a matter of seconds) in that position. The fact that three Sanctus cruisers and a lone Karuna were destroyed by that entire battlegroup from ideal firing position with plenty of warning (and, come to think of it, a major range advantage too) doesn't exactly make the Atreus itself very impressive.
I guess what I'm trying to say is that if the Atreus truly is the incredible ship you say it is, why am I only just hearing about the basic details about how it might be, in the form of a post on the forums? Maybe the Atreus was always this awesome in your mind/plan, and you have clear plans for how you're going to show it off in WiHP2, and that's fine, but from the perspective of just having AoA and WiHP1 to look at, the Raynor (and Atreus, by extension) has been very underwhelming in nearly all of its appearances and mentions.