Not an expert but decent enough to provide a few pointers –
1) Diagonal bars can be done with Repeaters and Wiggle Transform. Ensure that Wiggle Transform is applied after Repeater. Set Wiggles per Second to zero. Mess about with Wiggle’s Position and Scale props.
I should add that oftentimes, it is best to create such an effect using individual Shape Contents/Layers as this provides more control.
2) The Diamonds Transition looks like a single layer effect that has been nested, duplicated, re-positioned and the in-points staggered.
Other tips –
1) Use the standard wipe transitions where applicable as these are much easier to set up.
2) creating a single instance of a layer and its transforms/effect and then duplicating, staggering in-points and off-setting positions are a routine for most of the ‘busy’ transitions that you see
HTH
RoRK
Intensive mocha & AE Training in Singapore and Other Dangerous Locations
Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE/ACI