Ticket refunds vs further line up dates?

Are there further line up announcements (I'm mostly interested in West Holts, Woodsies, SEC) before I'd need to decide if I want to refund my ticket (I understand this is around April)?

I know it's not all about the acts etc. but for a number of reasons going this year would now be a push anyway, and the few acts on the poster I want to see I'm already seeing later in the Summer so need to make a decision. Thanks!