For a this generation, no you don't need a tune at all. I mean if you want you might as well since you have the free tunes for life but I can't imagine them changing anything in a canned tune besides turning off the CEL.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.