I presume you're asking about canonical scenario packs. In that case, I suppose the official answer would be "No".
Writing the scenario is the fun part. Everybody likes to do that.
But then comes the fact-checking and playtesting. This is a laborious, sometimes even tedious process. And it gets worse with each and every new publication because it has to comply with all previous canonical publications, and presumably some unpublished data behind the scenes.
Another aspect Herb once mentioned is that players and GMs are straightjacketed by more and more canonical data, just like the writers. When you want to play a Wolf's Dragoons lance in 3025 then you're limited to the detailed unit writeup from the sourcebook that breaks the unit down to each individual 'Mech and MechWarrior. You can't play your own WD lance and still comfortably pretend to be within the bounds of established canon.
I don't want to sound so negative though. Scenarios that contain little "hard data" that could conflict with other canon are fine. And we already do have the Bruderkampf scenario pack by Ulisses that I totally love - well written, well thought-out, well made. A totally fantastic game supplement. And available for free on top of that. Wow!
(And previously, Lawyers, Guns, & Money by FanPro, but it's not been made available for download again since the site was moved.)
Frabby, I don't know how much more I can agree with this post. :)
Every now and then some user here tends to jack inside my mind and post where I was going with a thought.
I'll have to learn German and read up on that scenario because it sounds fun.
This is why I selected "No", the fans can come up with wonderful ideas but they'll be fan based and non canon.
I know many others will disagree with me, due to gaming tastes, but I can't get behind precise units in a set scenario anymore.
The only exception would be tracks in the Chaos system that allow optional bonuses for bringing in star units or vehicles.
Part of the dangers in doing all these precise scenarios, other than what Frabby has illustrated, is the fact that at some point we'll need to bring in custom unknown mercenaries to fill in the gaps. I can't see CGL doing this unless it is a very unsual set of circumstances. Battlecorps tried doing Unique Mechs and fighters as a free product and that didn't last long.
There's only so many fact checkers, writers, and developers in this company. I've heard people say "oh well this will add more folks to help with stuff!" which is admirable, but then
those people need to be wrangled and managed. Then those managers need someone to overview them. All of this on a company that doesn't have a lot of "full time" folks working on it.