The Wererats seems to be the same CGI render as the WDH ones, so not based on the new art - that one is quite similar but has very torn clothing, more like rags, and no boots. But I like the pose, very sneaky and rat-like! Also both the old and new art are so similar there isn't much of a difference. I do wish he had a tail, but neither did the art, so that's probably why they don't. Nice to have a Wolf of a different color than grey or black. I'll keep a few for variety's sake.
Why not? Until 2025 Werewolves have beem Medium. Are you getting rid of all your older Werewolf minis suddenly because of a recent change? (and if so, can I have them?

I never accepted some changes 3E made, for example. I just continued with the old canon. I did the same when 5E turned Gnolls into weird fiends spawned by Yeenoghu (maybe Yeenoghu has followers inside WotC who helped him rewrite the lore so everyone forgets Gorellik...)

In other cases like Giants, I continue to have both the Huge and Large versions in my collection, as the minis look good, even if I prefer the Huge sized ones, I will keep the old ones too.
I assume those that are in control and not afflicted still have some modesty.
