It would have made for an awesome backdrop to the finale of the trilogy. Shepard fighting the Reapers in dark space, with the Milky Way; the physical embodiment of everyone s/he is trying to save; sitting in the background. Being trapped in the cold void of inter-galactic space would have made for a perfect Low EMS ending as well; Shepard has saved the galaxy, but can never return to it in his/her lifetime.
Its sad that two of the most fascinating locations of outer space (to me) were overlooked over the course of the trilogy namely: the super massive black hole at the center of the Milky Way, and the empty void of inter-galactic space.
Yup, instead we got to reenact the charge of the light brigade.
I mean, the tactics and battle-logic in ME (ME3 in particular) are just atrocious:
How do you kill a Yahg? You. Punch. Him. A being that should have been able to smash every bone in your body with one backhand. But Shepard somehow manages to push him back without the aid of some insane biotics or being a cyborg made from carbon nano tubes.
Facing multiple reapers on foot, somehow dodging their red beam of death, something that even nimble fighters and frigates have trouble doing, and not getting liquified or vaporized from the shockwave of a near impact.
Being defeated by Kai Leng's gunship, after taking down multiple gunships, harvesters, banshees, ravagers, etc.
I bet that there are many more examples, but none are as idiotic as the final charge, on foot, against Harbinger.
Think about it, Reapers have notoriously deadly targeting and analysis software, Harbinger has multiple main weapons, not to mention probably point defense lasers that are more then enough to vaporize a single organic, and we attack it on foot...
At this point I half wanted to see a total Reaper victory, because that's what the the brilliant "plan" deserved.
And what do you know, I kinda got my wish...