Utkatasana, "fierce pose", is commonly called "chair pose" or "powerful pose" and by some "awkward pose" or just plain "painful pose". Finding ease in this active, heat building and sometimes agitating pose seems to be a constant fluctuation in your practice. As your body changes and opens so does the focus and balance in this pose. We are constantly teetering back and forth with the work of igniting the bandhas and core while maintaining an open chest and shoulders. When this is achieved we find a release in our outer hips, a relaxed neck and effortless gaze up towards the dristi at our thumbs.
The pose Utkatasana constantly challenges us to balance the not to tight and not to lose qualities in our asanas and daily life. When finding alignment in Utkatasana you must explore working to reach your sit bones back and down while lifting from your arches up through your inner thighs and into the pelvic floor. These 2 actions create a neutral pelvis, free from the lower back pain that comes with "over arching" or letting your pelvis tilt forward and/or the strain from "tucking" which will round and weakin your lower back while tightening the shoulder girdle.
Overall this pose is about sticking with it, staying focused and maintaining a stress free breath. If you can do this as the agitation arises you may also be able to do this when frustration or tension arise in your life. The practice of Utkatasana on the mat will strengthen your patience with what arises off the mat and enable you to face the challenges of your life no matter how ackward or painful they may be sometimes.