Payroll is ALWAYS flexible (the owners can whine all they want, but ballpark is a license to print money and the TV station, better it go into the ballclub) - but not sure the money is best spend on resigning a 30 year old CF with injury history. If they could get him for 3 years, that is one thing - 5 years is a lot tougher. The financial commitment - who cares, not my money.
They will need bullpen arms next season - but they always do. But relievers are a dime a dozen, almost none of them are reliable year to year - so you are better off building a bullpen this way. If they wanted to put De La Rosa or Ranaudo in the bullpen, that would be great though low probability. (bullpen a good way to break in future starters) This is an area where Tampa has shown a lot of people - it's a lot more cost effective to sift through other team's garbage and random guys in the farm than expending any sort of long term effort on relievers.