I agree...the ancient landmarks aren't the cultural dress standards of the 1840's, 1940's, or 1950's. Nor are they eccentric teachings about hair (don't get me started on this one).
The ancient Landmarks, in my opinion are ....
I.
Acts 2:38
1. Repentance
2. Jesus name baptism
3. Holy Ghost infilling with speaking in other tongues
II. Loving the Lord your God will all your heart
1. You shall have no other gods before Me. (Oneness)
2. You shall not make idols or bow down to them, nor serve them. (Exclusive Christianity)
3. You shall not use the name of the Lord your God disrespectfully.(Reverence and Jesus name)
4. Remember the Sabbath day, to keep it holy. (Worship)
III. Loving your neighbor as yourself
5. Honor your father and your mother. (Family)
6. You shall not murder. (Value of Life)
7. You shall not commit adultery. (Value of Marriage)
8. You shall not steal. (Respecting the property of others)
9. You shall not lie about your neighbor. (Honest)
10. You shall not lust for your neighbor's house, or his wife, or any
thing that is your neighbor's. (Contentment)
All the "standards" we embrace are not "biblical". They too are a snapshot of what was culturally expected when the movement was in it's beginnings.
IV. Christian modesty
1. In dress
2. In attitude
3. In lifestyle