Thank you Alex.
I actually ended up going down the alias route yesterday. I updated the template used to add all the newly created indices that fall under the pattern to a static alias, then setup Curator to remove the older indices from the alias.
I didn't go that route sooner as I didn't have anywhere to run curator from, but got that resolved so I could use it for deleting old data.
I'll keep an eye out for a response from the Cloud team on the issue, as we may have other needs for a wildcard in the date math index reference in the future.
Thanks again for your help in digging to the bottom of the issue.
- Joseph