Well a 732 could land, but not a full one could take off. Waterford is due for expansion expecially after the current year which saw pax numbers growing with flights by Aer Arann to Manchester and Lorient in France. Not much activity out there apart from that. You got the SAR and some GA.
Im not a big jets driver but is it true that an a320 can use WAT, but not a 737? I could be really wrong here.