User blog comment:Eman4evr/Boots Boots and Moar Boots./@comment-6301771-20140514001814/@comment-12314620-20140515121107

At one point riot was in process of creating an ad item with spellvamp and it proved to be too powerful for ad casters. Therefore introducing spellvamp in boots would most likely have too big of a impact in game. I also think riot shouldn't overcrowd the game with items. Just try to remember how much items the game seemd to have when you first started.

What they could do however is improve existing items to the level where they would actually be viable pickups more often instead of being extremely niche items (SotD, Zekes, Banner of Command, Executioners Calling, Atmas Impaler, Guinsoo´s Rageblade) I for one love what they've done with Twin Shadows and find myself building it quite often as last item for midlaners/supports, heck even Singed loves it. Also the two stack items: Mejais and Sword of the Occult could be removed for various reasons...