I would have definitely signed either Miller to take care of our TB situation or signed Williams to alleviate arguably our biggest need, pass rush. One or the other. You can't fill every need in FA but there are enough of them that signing one guy at one spot takes some pressure off other areas.
For example, Williams got a 2 year deal where the Dolphins can walk away next year for only $2MM in dead money. So even if you keep him for 2 years, he's off the books when you have to start re-signing OL.
I hope they do sign Thornton. I hope they stay away from Carroll. He's cheap but he stinks. I think they'd be wise to look at a Patrick Robinson at CB and possible Weddle if his price is fair.
Cut Carr, cut Church, restructure Smith or Crawford or Bryant and you have more than enough cap space still left.
And in signing Williams, Weddle, Robinson and Thornton, I've put less pressure on my team to absolutely have to nail a bunch of picks in this coming draft to be immediate impact players.