I actually much prefer Evans' illustrations of old Mechs from TRO 3050U over the old Loose' stuff which always looked to me more like preliminary sketches than finished artwork.
Loose was trying to look more like "technical drawings." Infact, I consider the reason for the old art used on the extremely old designs from an in-character perspective to be that those were technical drawings, which really did not need to have refreshers,
since those designs really had NOT changed much in centuries, while the First In Centuries designs did, in fact, have subtle changes
in their first few decades(look at the head on the Wolfhound, for example). The First in Centuries section, much like the TROs
3060+, is more battlefield footage.