May I ask which "progressive songs" Adrian had written at the time ? Waysted Years, Sea of Madness and Stranger don't fall into this category, and his contributions in 7th Son don't either. The progressive side of the band was all Steve's at the time.
Exactly. One could argue that some of Bruce’s 80s contributions (Revelations, Powerslave) were far closer to prog than anything Adrian wrote for the band up until Paschendale.