Headshots?

Yup, it's definitely not as easy as it was in ME3. I think it's because the aim assist has been toned down quite a lot on consoles. Also, they're not headshots, they're "Weak Point Kills" according to the medal I keep earning.

After playing the Vanquisher SI extensively yesterday, I can confirm that headshots are more difficult than in ME3. For humanoid enemies the weak point seems to be their throat/chin area. Not sure if that's by design or just working as intended.

In ME3, yes. But MEA is like the autistic cousin who's really "special" and likes to shit on the carpet.

You were always good at popping heads HM, have you noticed a change too?

Really?  The Falcon? Hmmm...need to try that now.

whether or not it was a glitch, the enemies head popped when I hit him with the falcon the other day.  I believe Megabeast was in the game with me.  It gave me a good laugh.

I tried the Widow 1 on bronze yesterday for a couple of runs.

Kett´s heads prove to be big enough to single-shot kill them opposed to a hit on the body. It is harder to do because they are in constant motion compared to the camping and very predictable paths of ME3. At the same time, it is just as much if not more satisfying to make the mark.

What is the aim assist like? I just assumed I was crap at headshots because I turned it off.

Very weak. It feels more like a reduction in look sensitivity this time around (as in, within a certain radius of the enemy's model, the game will slow your aiming down to help you "stick" to the enemy), as opposed to the game practically aiming for you like it did in ME3. I still haven't gotten used to how the weapons feel as a result, and the camera in general feels really loose/floaty, which can be frustrating when I'm trying to use something that relies on pinpoint accuracy like a Carnifex or Widow.

I'm sure I'll adjust to it in time, but right now aiming doesn't feel anywhere near as good as it did in ME3, in my opinion.

I think the hitboxes are bugged off host. When I was playing with the vanquisher last night off-host (roughly 200 ping) I noticed even though my crosshair was placed exactly over the enemy's head, it wouldn't be a headshot. Then I tried using the vanquisher on-host and I didn't have an issue with headshotting, it was just as easy as it was in ME3.

This is probably more the case; kett especially are pretty keen to move when under fire.

I think MEA enemies may be faster. I have a harder time aiming in general. Maybe weapons are also less accurate? I am and always have been on PC, so no aim assist.

I have fond memories of my Carnifex popping cannibal heads.