Well i do think you were a diffuse thiner before the hair transplant, so you were not a simple case. In the pre op photos, you had a lot of thinning hairs and you were growing hairs from your donor to cover the front!
While now these hairs have been replaced with donor hairs, and you have better coverage than before. So there's definitely improvement from your pre op photos and it will be thicker till the 12 month. So just be patient.Dr yaman is a great doctor and you should be happy with your final result!
One suggestion is that by combing your hairs backwards, you would have better coverage...