To be completely honest, I was happy when it was announced that Paula wouldn't be back. Her "critiques" were insipid at best, completely out there and not understandable at worst. She was OK the first few seasons but recently they should have just skipped over her for most performances. Yeah, I know the contestants like having positive feedback but there's a point and there's a point. Between her and the idiot audience who would boo if anyone said anything besides amazing praise for any of the contestants (no matter how horrid their performance), I stopped watching.
Now they are introducing someone as a judge who has no experience in the recording/music industry. Yes, she's in the entertainment industry but it really is a whole different animal. The only similarity is that it is a cut-throat business. Hearing and seeing someone perform live and translating that to a recording takes more than "I like it". Look at Taylor. Sure he was "entertaining" to his fans watching him perform, but when you take that entertainment factor out he's not anything memorable. That's why his album fell flat.
Besides that, Ellen just drives me nuts. Never have liked her, not even when she was just an up and coming stand up comic. She's just not my style, not my taste.
Not exactly the choice you want to make if you're still trying to make a relevant music star out of the winner. Makes the show definitely seem like more of a talent show (i.e. The Gong Show or Star Search) than a show that ends with a huge recording contract.