Bullshit. He lifed blocks with kid in sea stone cuffs. Pre-tineskip Zoro picked up a house. Base luff (non devil fruit) has zero feats. He has access to no gears so no super speed in comparison to his gear 2 or gear 4. And he has zero destructive feats that place him on mountain level without gear 4. So if he loses his fruit now he has no feats that would place him in the same ball park.
Plus it's already confirmed that his insane mobility and endurance and defenses comes from his fruit.
Zoro has a fighting predicated on him not having his blade
"Base Luffy has no feats."
Because Luffy's fruit is a part of him. And if Oda decides that Luffy somehow lives and loses his fruit he will still have superior Haki than Zoro and will be faster than Zoro with or without his devil fruit. There is no evidence that proves otherwise.
"Zoro has a fighting predicated on him not having his blade"
Zoro uses Enma to cut boro breath and block the hakai. Without his swords, his bones would have been crushed into powder. The same way he was using his swords to cut pica, meanwhile Luffy was shattering pica with his haki and tanked boro breath.