How much money is tied up in the DLine already and with Marcel on the Horizon they will need to spend more. Signing Bradham soon would be nice and Kiko in a few years.
You only have so much money to spend and have it spend it wisely. They could of course attempt to sign everyone, go over the salary cap and then watch as your best players need to walk.
Take your pick? Lose one now or multiple later on due to poor cap management.
Teams that spend over the CAP don't do very well in my opinion.