Free agency is a great way to acquire some great players for teams. It allows teams to get players who can help put them over the hump or become new foundational players for their organization. There have been a lot of good ones for the Indianapolis Colts, too.
Most teams that have success build their foundation through the draft. That allows them to build homegrown talent and mold that player into what they want. If you look at the history of the league, that is how most championship teams are constructed.
But that doesn’t mean that free agents can’t help a team.