I don't think the problem is that Elemental Blast is boring, but that everything else in that tier is both even more boring and quite useless. Unleashed Fury has always been an uninspired talent and Primal Elementalist has always felt rather weird (why have a talent that basically turns your pet into a totem?). Rather than the current mess of talents, we should have just had a mana regeneration tier like priests have, with options like Elemental Blast, a passive buff to Water Shield and a personal version of Mana Tide Totem (or whatever). Then anyone who likes the active mana regeneration of EB can have that, and anyone who would rather skip it could pick something else that gave comparable mana returns.