I think there would be viewing interest/hunger for that 'economy' category, the Fnirsi, Owon, Hantek. There remains sustained activity on the forums on these, the vendors must sell a lot of them, they all have engineering and design 'issues', but which is the best compromise? Besides, the Owon HDS portable and the isolated USB one (VDS1022I) are quite interesting/distinctive devices. An informed side-by-side review of them all with commentary on what you can get done with them and where they fall short (as a category) would generate a lot of interest. I don't think a blow by blow exhausive feature review is actually needed in this category, just pointed insights to sort them out. The emergence of this category seems to have caused an interesting 'inversion' of prices on Ebay where some older generation DSOs are selling cheaper than much older analogue -- should economy buyers consider any used DSOs instead?
Then the $500 benchtop category with the usual suspects: Siglent, Rigol, Micsig, GW Instek. People will be looking more closely at performance/quality/feature differentiators (but you have existing material on many of them).
Maybe push the $1000 category up to $1500 if the product 'capture' isn't right. People will want to see the new Rigol and the Siglent SDS2000X Plus in the pool, won't they?