If Derya would be in the roster, it should be instead of Fatma Yıldırım who is definitely mediocre at everything. I think Meryem also doesn't have anything to give to this team anymore. It is not worth to take her in the spot of 4th MB
No Seyma is terrible, she can just serve sometimes. She didnt even play a close to decent club season even against mediocre players so I don't know why she is called. She will be benched this season in THY lol.
Both Meryem and especially Gözde Benchmaz should also leave the team.