Hi Bannercounty,
Valid point of view, and Belfast has in many ways a similar challenge with people going to Dublin etc. The key difference being the strangle hold that RyanAir have over the place at SNN.
AMS, the airport asked about destinations and preferred timings etc, herein lies the problem. Of the 30k who want to fly to AMS would a 3 times weekly Embraer suit them at whatever time offered? Not sure... in AMS FR cannot get more slots to expand, so in that competitive environment for slots, likelihood is that airlines will see lots of better opportunities on routes with better returns ... so for a multitude of reasons SNN AMS not a runner..
On the same theme as congested airports and lack of slots and FR not being able to expand at LGW , will SNN maintain the SNN LGW route? As you point out timings are less than optimum