For your current study. I can't be bothered to read it at 3.50am, but improvements are always just "i would use a larger sample" "i would use a control group" etc boring generic improvements from things you think are weak in a study.
For example if they used 3 participants and all were male and from texas. Then their findings are a load of ****. So you say i'd do it with a systematic sample of 500 people from across the US in order to make sure the results can be generalised etc etc blah blah. It's AS psych just talk **** you get marks.