I disagree. The only books I can think of that treat their deaths callously would be X-Force and well...it's X-Force so I don't expect anything less. Every other book have treated the resurrections as at least a minor plot point within a given arc.
And I also disagree with the idea that the X-Men are being written more incompetently than in the past because I can literally throw a rock into any previous X-Men era and find multiple instances where the X-Men acted incompetently or "less skillful" than they usually are.
The problem is lazy writing. It was here before the resurrections and will be here after.