I can't see Steve packing. if you've done long distance TTs you'll know that there's a hierarchy. The top contenders have a strict schedule, and when they're off it they stop. Everyone else has a cascade of subsidiary goals.
I'd start off with a goal of 400 miles, then 600km, then 15mph average, and so forth.
I don't buy into the binary Record/Failure idea, and I'm surprised that so many do. The moped incident has introduced a element of complication. Steve should have had an uninterrupted year, and we'd have seen what he could have done in his own style. I don't see anything wrong with Steve continuing to August at any pace he feels like doing.
The interest to me lies in seeing how someone can move forward from his current state. Most training manuals would see what he's been doing as a recipe for getting slower. Without a need to target the record, other training approaches can be tried. The HAMR clock has been paid for and it runs until August. I'd like to see Steve move to a more normal workload, and to target TT distances, culminating in the 24, via the Mille Pennines and the Wild Atlantic Way.