No, I don't think you can compare 'Days of Future Past' and 'X-Men Apocalypse' in this regard at all!
First of all 'Days of Future Past' very much shows civilians and human reaction en masse in scenes taking place in the past. In the future these reaction do not matter at all, because it portrays mutantkinds last stand. For what particular reason shall we see human reactions in a lost future where hate has won and every mutant is horribly killed?? The Sentinels are the ultimate representation of hate winning. There is no goodness in humankind left! Every death in these scenes is a reminder why it was necessary to change the past, while the scenes taking place in the 70s show new glimpses of hope in mutant and human relations. To quote Jennifer Lopez:
"Those who hate us and fear us/Can not keep us down/Cause we hear in our heartbeat a beautiful sound/If they try to deny us or silence us now/We just say no, oh, yeah, we let 'em know/Love make the world go round/And love is love, is love, is love is love." :-p
In 'X-Men: Apocalypse' the tables are entirely turned. Apocalypse creates a massacre with million humans killed in cold blood (more than 10.000.000 people are living in Cairo today). Mutants are not the only direct victims here but also ordinary humans living a peaceful life. My question is, why does Bryan Singer (and you for that matter) not feel the need to show this horrible violent act with direct repercussions and as indeed extremely horrible? Is it maybe because we are actually dealing here with the life of mainly Egyptian muslims and a white North American director does not feel the need to show violence in this particular context as devastating?! (this movie becomes very ugly in the discussion how Western media are dealing with terrorism taking place in the 'West' and in the 'non-West' and what produces stronger outcries, empathetic identification and general media responses!) And why does not even Storm gets a moment of grief or hindsight after probably everyone she knew in her life is killed? Magneto and Storm are welcomed smiling with open arms into the X-mansion after they stand still and watched satisfied while all these humans are massacred in Egypt? Who is rebuilding Egypt? Does anybody really care? In a nutshell:
WTF! What the **** did Bryan Singer think while he edited this dumb movie. And why did he gave the audience not any reason to understand what the hell just happened in the last 50 minutes or so of this movie?!