It is quite extraordinary that an airport with 6 runways can be reduced to being almost a single runway when mother nature doesn't cooperate. The worst storm winds are NW and that is between the runway directions. With sever cross winds several runways are not an option.
There are not many runways aligned NW in the Benelux. RTM is 24; thus 300 is nasty. RW27 at AMS is better, but then the winds were stronger. EIN is RW22/04 so even worse; not a good choice of alternate. It would seem to me the EDDK Cologne with 32L/R would be the best fuel choice. As one correspondent on the story in AV said, extra fuel for diversion needs to be for a place where you have a solid guarantee to land. If destination is dodgy you must have an escape route or full tanks. No ideas about the flaps; F25/30 would be more normal for gusty X-winds. The landing seems to have been well controlled and RW27 is well long enough for the higher speed.
Yesterday was nasty for Benelux; choice of runways limited.