One big oversight in yoga and cueing in the yoga class is the fact that we all have different proportions in our bone lengths. If your arms are short versus long, your experience of certain yoga postures and transitions are going to feel very different and may benefit from using blocks.
In this video I use the examples of jump backs, seated twists and stepping silently back to plank to illustrate why having shorter arms in yoga does not mean you are not trying hard enough in your practice, but that you might feel more comfortable utilising the props.
Take a look and see if these tips and tricks might be useful for your yoga practice.