I don't hold any hard feelings for Compass pilots either. But stapling them would have to be agreed to in writing prior to any kind of operational combining. It's been my experience that people who readily agree to be stapled, change their minds dramatically after the combination and sue to get themselves inserted into the seniority list by DOH or some other fashion besides stapling.
If there is a prior agreement, and a waiving of any right to sue - then staple away.
Carl