I never had an issue with it on Normal first playthrough honestly. Now, Insanity? I died I think about 4 times.
Are you going to try out Insanity? It's really not that bad after a while. You get used to it and with the right class (Soldier, IMO) you honestly feel every bit the badass at the end as you do on Normal.
The Scions could be rough on Insanity, the Husks never really bothered me (again another reason to do Soldier -- shotgun is a lifesaver with those fucks). But yeah, Scions...some of those (Collector ship with those AND a Praetorian?) are like full on boss battles.