Some employment position descriptions require [or prefer] a technical degree. Some don't. The best advice that I could give you is to surf job postings for positions and employers that you'd be interested in, and see which ones specify a technical degree. That should give you a better feel for the second degree's value.
As an ELT, if you have any plans of going into RP after you get out, plan on taking the NRRPT before you get out. They offer it twice a year and any separating Navy ELT should be qualified to take it. For some jobs, it might be more valuable than the second degree.
Good luck,
MGM
