They'd probably redesign them again to look like whatever the next game's counterparts look like, but I'd certainly like it if they used the classic design again. Nobody's really complained about it so why not? If it makes the anime only slightly more original than the games, then I say go for it.
I am the current leader of Save Our Voice Actors, a Pokemon fan group supporting the voice actors in the anime dubbed by 4Kids (seasons 1-8). Our goal is to provide The Pokemon Company international with encouraging feedback in support of returning the main cast members. If you're interested, please visit us at facebook.com/saveourvoiceactors