Agreed. I understand limiting its power, but taking from 50 down to 15 is drastic. Now even a fully charged, perfectly executed bowcaster hit can leave an opponent alive. More than once I've done this and been killed by that enemy before I can pull out my regular blaster and finish him/her off. Ridiculous. Actually makes the last card unlocked a detriment and I don't use at all anymore.
The he same now goes for the Homing shot. I understand decreasing its speed, but decreasing its distance and increasing its lock time ensures that it is useless in battle. The only time you have an opponent that close with 1.4 s to kill is when they don't see you. And if they don't see you, might as just use your blaster. Could also help for opponents with a shield, but shield not that common in big game modes and still with a lock time increased over 4x (I honestly thought it was too long the way it was before), you'll usually be killed by other enemies while trying to get a lock on the one. Again, I don't use this card at all anymore, which is a shame cause the cards are (were) the best part of the game.
EA/DICE, please consider making the changes to bowcaster and homing shot less drastic or just remove them from the game. They are now more likely to get you killed than get kills for you.