DEX gives only a small amount of adjustment on your stats, unlike when you change STR.
And they say that the DEX and STR description is very old now and NOT updated as we must see in FREYA version.
We can't really be sure now if the description of STATISTICS like we see in other website (STR,DEX,INT,WIT,MEN and CON) if they are accurate as it say on this new version of Lineage.
Due to experience of other players STR now is giving more effects on daggers than having a DEX.
STR also gives a possibility to doubles your crit damage. No re-use time for skills (means you can do your deadly skills without Cool Down).
STR vs DEX Daggers on other forums:
read from top to bottom.
Masters excellence in skills. Low possibility of being able to reuse skills without delay or doubles the duration. Influenced by STR.
With this passive skills this brings the game in different twist and needs to discover by experience. STR now is giving a big factor on almost fighter class.