Interested in everyone, sign no one.
Maybe a little overboard. They will sign some FAs, but they will be one- to two-year cheap deals for players who can fill a starting job but aren't good enough to get paid more.
The Joneses gave up on big-name FAs a long time ago now. They decided that you don't get what you pay for, so it just creates a drain on the cap. They decided they'd rather pay the players they know than the ones they don't know. They are overreactionary, so this was their response to a few big-name failures, specifically Brandon Carr. That is the last big-money FA signing they made. They did sign Greg Hardy, but his contract was cheap relative to what a starting end of his caliber cost (because of the DV issue), and really that decision just cemented their thinking since Hardy did not play that well and became a distraction because of his attitude.
I don't know what interest they are showing in these FAs. It might just be the Cowboys name being thrown around by agents. But they haven't been buyers in the market at this time of year, so expecting them to sign any outside FA except cheap ones isn't realistic.