Believe those DW issues aren't reprinted (and IDW didn't reprint them either when they reprinted other DW comics) are legal reasons relating to the bankruptcy of Dreamwave and some creators not being paid for their work on those issues.

Armada is not G1 and doens't really belong anyway, that some G1 characters appeared means some of the issues make sense, if you squint, but they could have left Armada out all together and I'd have been fine.