How about a Tempest revamp:
Gain access to using a warhorn and gain a new elite that will ‘overcharge’ your warhorn and turn you into ‘one with the attuned element’; giving you a new form and 2 (or perhaps even 5) new, element-based warhorn weapon skills AND give attunement swapping a more dramatic effect, making more impact on spot (skill effects) and visually impressive. Give those a crazy synergy with shout skills to make it all interact a bit more and to make the warhorn a bit more appealing… Trying to change the same skills the announced tempest changes, but with a more thematic feel.