Thread:User talk:Rua/MewBot verb form categorisation

Why is User:MewBot removing templates which encode English conjugational categories (e.g. Category:English past participles)? While there are some flaws with the categorisation system for English verb forms, I think removing all the categories and plonking everything in Category:English verb forms is tantamount to the deletion of information that could be potentially very useful for some Wiktionary users.