put some more critics quotes in and it should be a high marker
Not sure about that....changes in marking at the centre showed there's been a shift away from critical readings. Readings are only there to shape your reading, not be the basis of your argument. Hence, placing in a critic's quote won't give you a higher mark.
As for the actual response, I don't do yeat's but i can comment on structure and language.
good linking to thesis. Analysis is thorough and there is no recounting or 'showing' from what i've read (sorry Ryuu-jin-jakka but i have new clue what you are on about). Good use of linking of the poems e.g 'Conversely' and ' In Contrast'
It's just the smaller things in the response such as the use of 'I' and 'own' that shatter the academic voice you've been trying to obtain. Use words such as the 'audience' and it'll still sound formal but the marker will still know it's your perception.