We are looking for Cumulus LTS. We are currently on Cumulus 5.11.1, the latest release is 5.15 and does not seem to have LTS. What are the major improvements in 5.15 that would encourage the user to move from 5.11 to 5.15 and not wait on LTS?
This question will require in-depth investigation than is possible through a forum. A support request would be the best way to resolve this issue.