This is my main issue with Ansible: as soon as you run a single raw shell command, haven't the main benefits of Ansible just disappeared? And wouldn't it be likely that you'll probably need to do this pretty regularly?

Some of the modules seem pretty pointless as well, like the synchronize files one; why not just use rsync directly? And while you're at it, just SSH to servers from shell! Sure, you would need something similar to the inventory, but that wouldn't be too difficult to come up with...

I think investing time in building a library of idempotent shell scripts instead is the way to go personally.