Well +25% for crit agility, because.. Well why wouldn't you get that perk, it seems like the most useful in the game, and to be honest it was the main reason i bumped my agility up by 2, not that getting knocked over was a huge problem with 1 ag (50% isn't bad, and that is with paperwall), but getting knocked over even less, is always a plus.
Dumping AP is a technique for moving quickly in general, but more so, for running away where you don't need AP anyway, people can dump or flush AP to get away easier without having really participated. That does not seem like the intent of the mechanic, and staying at full speed by, in essence, exploiting the mechanic says to me that there is need of a reworking, as cirn0 suggested in the third post in regards to low AG characters being benefited over high ag characters potentially with perks (I mean shouldn't they be the ones getting advantaged? I.E. by inverting the mechanic, low ag characters lose out and high ag characters are at an advantage).