i think its good to get a replacement for safety reason. you wouldnt want it to crack while she's rolling it, or somewhere in the pin deck.

i had a similiar case, a track freak a zoid which i am still using, i rolled one shot, came back and the coverstock near the fingers had a slight crack. Patched it up, and rolled for a few weeks before needing to redrill my thumb slug yesterday. Just to realized my filler inside has cracked, but still redrilled a thumb slug and using it for practice or fun bowling.