Workaround for defect in promotions being created for extractions?

We've been testing v15 this month and recently ran into defect 142710, where if you using an extraction to extract a file, promotions cannot be created.

Tessitura's suggestion is to extract to a list instead, but our trouble is that all of our extractions have multiple segments and we always want to have separate sources for our segments. The workaround for us, then, is to create separate lists for each segment and promote them individually, which essentially quadruples the work of our email manager when preparing mailing lists for Wordfly.

Anybody know of a better workaround than what Tessitura's proposing here? This issue is resolved in v15.1 which I hear is due out in April, but that means that we'll need to go at least two months with this defect still in place.