Female versions of characters are almost always better.
Shinjiko in that reversed evangelion copypasta? Yea.
Archer may be GAR and all, but Archerko hitting on every member of Shirou's harem? FUCK HOT.
Ryougi Shiki is basically a better version of Tohno/Nanya combined. Hell female Tohno Shiki with breasts that Akiha envies would make half the game more interesting right there.
Female Saber is way better than the prototype generic male Saber. For that matter female Shirou with a lesbian harem would be more interesting.
Female Saito having a lesbian harem and bath scene with Siesta? FUCK YES YOU ARE THE BEST BATH FARMILIAR EVER.
NanohaxFate instead of Triangle Hearts NanohaxChrono prototype? Obvious.