Findings so far.
Unit changes to secondary weapon when it is knocked down and get up again.
Therefore the overall level of use of secondary weapon in the mod will depende on lethality I think. Low lethality(of succesful hits) will have many knock downs and many secondary weapons. High lethality will of course kill more and therefore less secondary.
Also any individual unit can of course be given higher defenceskill thereby making it less likely for enemyunit to score a hit at all.
Edit: fs_s1_gladius looks great as a secondary animation for hoplite spear. Shields close and stabbing motion with spear.
Edit2: Finished with test. It works fine and could give hoplitewarfare a temporal aspect.(break enemy soon or loose attackpower).
On walls these settings makes them fight with secondary weapon(unless you put them on guard mode and dont order an attack). This makes them less able on walls(if secondary weapon is weaker as I suggest).