Here's a couple more suggestions and not ideas:
1: Bring back locks/challenge-cooldowns/whatever - we already have plenty of scaled instances/skraids and will have tons more. Bringing em back will end the constant sammy farms and encourage farming other stuff too that is equally easy.
2: Relic Wallet - like the premium barter wallet, but allows LI relics to be pooled among toons (Note: I was told 'suggestions' could be used, but 'ideas' could not be used, for whatever legal-ish reason. This is a 'suggestion'.)