Just curious what kind of DA details are you looking for? Before I became a BT writer I was a big fan of the Dark Age so I might be able to help answer your questions.
What Adacas said.
I'm very curious about many aspects, such as:
1) The Marians' Kendall campaign, if New Avalon is actually conquered, or under invasion(either way, a detailed campaign description)
2) Basically an Objectives 3150. What do the Marians actually build from their known and unknown factories? How far have they expanded since Objectives: Periphery? What did the Horses actually secure from their Tamar conquests? The ambiguous wording in the FM causes one to wonder if it is to be assumed that the Horses produce T-Wolves, T-hawk IIs, Carnivores, Black Wolves, Gargoyles and other choice Wolf units? What ARE the Suns producing since their 3079 Objectives? I'm sorry, but mini-snippets in every TRO since 3085 don't add up to the overall picture. How much have they rebuilt by 3130? How much industrial expansion took place since the Dark Age?
3) The "current" time is 3150. There is a TRO for that year with more mini-snippets that leave you with more questions without actually answering much. But no campaign sourcebook like FCCW that actually details what is being alluded to in the TRO. No FM that details the frantic rebuilding/reactivation efforts of the militaries.
4) And of course, the rather unconvincing way that the Combine is, in effect, making First Succession War-style mass conquests with such a paper tiger military and continually advancing without the Blackout or massive insurgency problems hampering them. For all the mentions of such insurgencies in the FM and the virtual wiping out of some of their Mech regiments' conventional supporting units, they can still make it to New Avalon by 3150 and potentially conquer it? Come on, even the Lyrans managed to force the two strongest Crusader Clans off their capital, and the AFFS can't do that with the quality of units defending theirs?