Kill assists should be proportional to the percent of total HP damage dealt, not a flat number; should range from 1-49 WP. The more damage you did to an enemy with your assist, the more your helped your teammate get the kill, and rewards should be based on how helpful you were to your team. Right now doing 10% of damage to the total HP of the enemy is rewarded just as much as doing 90% of the damage to the enemy's total HP.

Headshots are their own reward; they get you a kill faster, extra WP are not needed. WP should be used to incentivize being helpful to the team, not for rewarding 1337 skills (which already get rewarded anyway since skills get you more kills). Headshot or not, a kill is just a kill, a headshot doesn't help your team in a way a regular kill couldn't (as far as I know).
This sets a precedent in which various different types of kills could give different amounts of WP, like melee kills getting more WP, or explosive kills getting less WP, etc. I don't like this, because no matter how you do it, a kill is still a kill.
Giving WP for saving a teammate makes sense because it rewards helping your team, but seriously you guys plan on adding extra WP for "revenge" kills? *sighs*

Other than that, good stuff. I would increase the dropship WP percentage, increase the time window to 2 minutes, or give a 15 base WP for the transport.

will we be getting any WP for hacking enemy vehicles? if you hack an enemy tank, dropship, or LAV, you should get WP as well. say 50 WP... like hacking an installation. after all, the enemy does lose it.