Seems like Stubs exist mostly to solve the problem created by the new item page layout/stats and ranking system, meaning it's a way to programmatically remove items from the system that have little to no chance of ever having a populated stat sheet and decent ranking.
Viewed as a necessary component of the new item page/ranking system, I think it's an elegant solution that feels fully-realized right out of the gate. So, nice work!
Now, in the spirit of de-prioritizing entries that aren't major players, what I'd love is to one day log in to EB, search for "Stratocaster", and the top hit is THE Fender Stratocaster entry, and every artist confirmed to have played any flavor of genuine Fender Stratocaster is listed in the count for that master entry, and from there I can navigate to all the sub-categories of Strat, and see that specific model's item page, and the subset of Strat artists confirmed to have played that exact model... In other words, EB's navigation more closely matches the product family navigation hierarchy you'd find on the manufacturer's own website... Obviously this is NOT something that would need to happen for every item, or even most items, but for the biggest products out there, the ones that are pillars of the industry, I'd love to see it... and all those Strat entries marked as (Duplicate) or are color-specific... they just go away. They're no longer in the first page of search results... or better yet, they're just gone.
Furthermore... If any of those Strat attributions have been deemed "Completely Incorrect", then those incorrectly-attributed-artists don't show up on the item page.... Better yet, those incorrect attributions are also filtered out of the Artist's EB page after a certain amount of time has gone by.
If you're in the mood to marginalize entries, Subs are a great start, but let's keep it rolling! ;)