Absolutely yes yes yes. If you plan on a long term career as an appraiser, then yes, upgrade.
I've just recently upgraded and after 5 months of being slow, I'm now very busy. Some from FHA, some from a couple of AMC's that recently sent notification that only certified appraisers can now accept orders, and from private/estate clients that were told to hire a certified appraiser.
I know there are licensed appraisers out there that know far more than I do and have been appraising for many years. They received plenty of notice that things were going to change in 2008 and all they had to do was take a class or 2 to upgrade their license. Many procratinated and didn't get it done. Sorry, I have no sympathy for them.
For you to push forward and complete the education to upgrade shows that you are dedicated to the business.
K~