The real problem was actually how easy it would have been to proc Runic Echoes with just an instant point-and-click Smite. Now, in theory, you have to land a spell or get at least closer to your opponent to use them.
From what I understand, you dislike only the interaction between Luden's and Rylai's, not spell effects in general. Rylai's is currently overturned, and I think its slow will actually be one of the first targets they nerf.
I don't think removing Luden's Spell effects would be a good choice, because it actually removes some cool interactions (Liandry's Torment, Deathfire Touch keystone, Athene's and maybe some Akali/Morgana players like this item).