I'd say a diversion to Gerona out of Beziers makes perfect sense. 90 miles, over water, even an alternate in between if you need it (Perpignan) and another big one to the South (BCN) should Gerona close before they get there. If you have time and are not comitted to a immediate set down on the nearest piece of concrete, it makes perfect sense to go to a place nearby with all the facilities you might want and need.
I'd even reckon that until all checks are done, they'd be in the Gerona area as fast if not faster then setting up for a reland at Beziers. Apart, the landscape down there has more runways than you'll ever need with Montpellier and Garons to the East, Perpignan and Gerona to the Southwest and even Istres or Marseille. All of them longer and better equipped than Beziers and with several with maintenance facilities.
Frankly, I'd rather fly with a crew who will use the time given to them to come up with a sensible solution rather than one which will dump you back on the ground at the closest piece of concrete even though it might not be the one offering the best options.