Your "Fan Service" Issue kinda missed the whole point of Logan though in his Normal Route. There are lewed scenes with him of course but he is probably the most "Not Lewed" NPC that has gotten this much screen time in the game.
It may be your own opinion but I honestly would argue hard that that quality exactly makes him unique and the interactions we do have so much more special in comparison for our Normal Logan and down right wholesome and cute wen he expresses affection.
As he does express deeper emotions and care for us just subtler and less outright sexual as most of the other characters so for those reasons I dont really get the complaint about him as this is just who he is and taking that away while specifically not choosing Bottom Logan and going for normal would kinda take away a huge chunk of why I like him.