Would it help if I took the AHW keyword off my album? All the images have AHW in the keyword section, so they'd still show up in searches. (Not that I object to your glasses showing up there, of course, Max - the more the merrier!)
I think options 1 or 2 would be easier to handle: printed glassware is a huge topic. And, as you say, any work we did on the AHW designs could always be incorporated into a more general site later. I quite like the idea of a Sherdley/ Ravenhead site, with a sub-section on AHW as their most prolific designer (which could include info on his designs for Bagley and his textile and bookcover designs).
Having been forced to split up my research material into different sections to keep file sizes manageable, I have files on AHW himself, United Glass, Sherdley, Ravenhead, and screen-printed tumblers. Though it would all need editing to exclude copyright material.