I wouldn't be as harsh with my criticism, but perhaps larger examples of each. Hey here's a lambda + api gateway + r53 + s3 deployment, and how that consistent environment looks under each deployment.

What makes 'x' different/better/more labor intensive than 'y'. Perhaps adding a git repo with all the examples aggregated and call out improvements you'd like to make

All that said, keep making content. Don't let "vapid" feedback bog ya down.