Whether your incident turns into a complaint or lawsuit will depend.
Personally if a LEO acts professionally and happens to overstep his authority a simple reminder either via letter, complaint, recommended training for staff would be fine.
If they treat me like the person in Philly where guns were pointed at his chest I would be pushing for a lawsuit.
If the department is willing to work with you and change their behavior we shouldn't be looking to hit a OC-violation-lottery. If the department involved obfuscates and refuses to address the underlying violations and remedy them via training, apology, etc a lawsuit may be the only language they will be willing to hear only because they will be forced to listen.