This whole Jet2 thing is intriguing but regardless of who is right or wrong, it is a public embarrassment for BFS. I presume BFS management were aware of LS's concerns? It would be rather strange to go public on the issue without giving BFS reasonable chance to fix it beforehand.
Supposing the issue is 'stones in the engines' and not wanting to flame an Airbus vs Boeing war......EZY & TCX use A32x at BFS which have a higher ground clearance at the engine pod. Could it be the combination of 737 engine pod being lower to the ground and possible higher than normal amount of stones around the runway/aprons/taxiways due to ongoing resurfacing has caused instances of ingested stones?
Anyway, if there are safety concerns the right thing to do is investigate. If the consequence is sending PAX to a different airport rather than cancelling their flights, so be it.
AC