You can just to be safe. I linked my
UT tickets to
MDE before our trip, and I brought the Tyvek tickets with me, but I never had to use them for park entry.
I did use them in the legacy FP- machines while they were still there. But that's a moot point since they're all gone now, presumably permanently.
BTW I didn't even bother to have my Tyvek tickets exchanged for RFID-enabled tickets (since I had MBs already).