In SDM 14.1.02, the Update Status activity has been enhanced such that if you try to save the activity but did not change the status then you will receive a warning message and you cannot save the activity.
This should be extended to the Transfer and Escalate activities as well. Currently this allows analyst to log activities which may trigger events without any actual change being made. The workaround is to create customizations to handle this when there is no business case I am aware of where to create a 'no op' activity should be the out-of-the-box behavior.
A more robust solution would also allow Administrators to set this for any Activity Type. I am thinking of custom activities here.