Throwing granades never was a main option in a combat, it was a suport device! soo thats why there is no high end perks for it... but it would not ruin the game balance if the Bonus hth attac would also have the -1ap for throwing. Woulnd not make a significant balanc change, but would make more options for new chars... right now only ranged weapon users has this bennefit. I mean to throw things at your enemy with less ap without mutch effort.... ranged weapon builds take BROF anyway soo.... melee alsoo takes BHTHA.... why not both of thes perks had this effect for throwing? But thes perks not gona add up so it could not be exploited with tagging both throwing and close combat.