I have only substituted KBs for TB deads when I either was feeling stale or nursing an injury.
Now that I have a slow healing forearm injury which limits what I can handle without too much discomfort...it may be time to switch things up again.
I enjoy sandbags, KBs and dumbbells anyway...but I don't think I'll be swinging any up for my shoulder work presently. Too hard on the forearm.