Not a base bonus, only a material bonus (Valorite). Plate, wood, and leather have a base of 15 while bone and studded leather have a base of 16. Barbed adds 12 and Valorite adds 13, while Bloodwood and Frostwood add 18.Plate Armor still provides a slight base Resist total bonus over Leather, even today.
Sounds fine to me, but I guess it depends on what people want to do with revamp loot. As it is now you can't craft anything close to revamp artifacts, and if you could I suppose it wouldn't really be too much of an issue due to hard caps. The problem is usually +skill items, and gimp templates :/.That's what i suggest. Make all Platemail (Human Platemail and Samurai Platemail) equivalent to Gargoyle Platemail in base Resist totals. As an example, in order to get a human Platemail Suit to all 70's, it takes me a total of 7 imbues spread out across the pieces to do it, and that's literally 70/70/70/70/70. In contrast, it took me a total of 5 imbues spread out across the pieces to get a Gargoyle Platemail Suit to 74/85/70/82/73, and that's with Gargish Earrings/Necklace not benefitting from material type or GM Armslore.
Perhaps at least balance human/elf leather and plate to wood, or change how material enhances leather and plate.