I'm sorry but people have been whining before the movie was released about how nobody significant dies in these movies but the minute they do kill off someone important, folks are quick to cry for a swift resurrection.
I'm sorry but Coulson and Bucky being brought back from the dead or seeming dead in the latter's case was enough. The MCU doesn't need anymore characters to come back from the grave.
Quicksilver is dead and I hope he stays that way.