Today I both drove the new US 219 segment southbound, and went back northbound to re-drive the bypassed old alignment. No route numbers for the old alignment shown on the Berlin Plank Rd. exit SB, or the US219BusMey_N exit either SB or NB. Moreover, there is no new route number signed on the NB old alignment, just a lot of remnant old US 219 signage (both route markers and reference markers).
Since the new segment opened just a few days ago, and there was some uncertainty when it would open (it opened two days later than scheduled), no surprise that no signage changes were done right after a long holiday weekend. Maybe later.
One thing that would make sense for part of old US 219 would be to extend PA 653 southeast of Garrett, to connect to the new US 219 alignment.