Coromondel is a Daily train and Howrah-Puri Shatabdi is also a Daily train with nearby arrival and departure time from howrah with few hrs difference. So, only if HWH-Puri SHBTD is shifted to Shalimar then only Coromondel exp can be shifted back to HWH keeping load same on HWH platforms.
HWH-YPR and HWH-TPTY Humsafars r not daily trains, so notrequired to be shifted to SHM