I dunno. It might save you money if you can get credit for pilot ratings you already have. As for "keeping you sharp" for breaking into the industry, from what I've heard from others, there is almost zero net benefit to holding an aviation degree over any other when searching for pilot jobs.

If your goal is to "check the box" for a 4-year degree asap, an online degree might be for you. If you're interested in getting the most "bang for your buck," my advice (unsolicited, I realize) is to major in something you're interested in outside of aviation and preferably at a brick-and-mortar school. I believe there's much to be "learned" outside of books, through live interaction with instructors and peers.

It's a personal opinion, and advice that I doubt you are interested in... but you know how these forums are; everybody has to chip in their buck-oh-five.