As I said, I'm sympathetic to this. To be fair, a decent chunk of my diatribe should be allocated to Bungie, because seven of those ten months Limited sat idle was on their watch. So you're getting more than your due of angst from me, because you're the ones holding the potato currently, even though you haven't been holding it for that long. Such is the way of things.
(As a side note, explanations like that - we're at the playlist limit, something has to go - would be great to have when announcing removals. One thing I wish Bungie did was provide reasoning behind their change lists. Some things are self-explanatory, but for many, we're left asking, "they're doing this why exactly?" In this case you've got a perfectly good reason - we just didn't know what it was.)
P
lease consider dropping Limited into Score Attack, unchanged, as an interim solution. If there is a game type cap of ten, which this would surpass, nuke one of Rocket Attack or FRG Attack, as they are redundant (identical game types with different heavy ordnance starts). I know you just said you don't have time, but that one thing would go some distance toward filling a niche that is now gone.
For me, when the story of Reach's life cycle is written, the lost potential Firefight had will be the main thing I remember. Both in design - so close, yet so far - and in implementation. For most others it will be about MP, but my love in Reach is Firefight, and it's been rough seeing so little done with it. I'll continue to beat my lonely little drum until Halo 4 lands.