Maybe this is by design but existing enchantments like burning blade and evade don't scale with newly build shard shrines of the appropriate element. i acutally have to dispel the enchantment and recast it to get the benefits of the new shard. while not game breaking it is a nuisance. a lot of times i forget as i have to remember when my shard shrine finished building and what enchatments i have already casted, not to mention waste more mana casting the spell again.