Emrecan Uzunhan, who wasn't considered in the squad, was loaned to Antalyaspor again. He is still a young player, experience is very important in defense. Emrecan's loan was the right decision. It was already very difficult for him to play for Beşiktaş. At least he will have a chance to play in Antalyaspor. He was loaned to Antalyaspor at half-time last season and played in 12 matches. He will play again this season and gain experience, maybe he can be included in the planning for next season.
This summer Besiktas really seems to be doing significant overhaul, they sold and loaned some players who could not play well with them and instead looked for and brought in better players.
For Emrecan Uzunhan himself, it can be seen that he has not performed well during his time playing for Besiktas, Antalyaspor or İstanbulspor and of course maintaining such players and only putting them on the bench can also be detrimental to Besiktas.
Indeed, the only mistake in having young players is the lack of experience and development of better playing skills, if he plays well with Antalyaspor, maybe in the future he can become player to strengthen Besiktas.
But I think that is not an easy thing considering that Besiktas currently has some pretty good defenders.