No. If the project was originated on DV, you'll lose nothing, and gain nothing, by rendering to uncompressed. You'll incur VERY long render times for no gain.
Render to NTSC-DV in most situations, even for archiving, if that's how the media was acquired. If you imported uncompressed or 4:2:2 from some other capture source, you might consider uncompressed, but otherwise, don't worry about it.