If you cannot feel your deltoids working when doing lateral raises and its all trapezius, you need to the following 1. Slow your reps down on the eccentric, slowly lower 2. Lighten the weight, make each rep fluid with ZERO momentum 3. Increase the reps, do 20 rep sets for extended neurological wiring 4. Move the hands forward to the scapular plane, not straight out to the sides 5. Think about Reach OUT versus raising the weights up. Imagine you are trying to touch the walls to the right and left of you Lateral raises universally work for everyone, they are just done sloppy. Easy to fix in a single training session