Too many hints. Too much saccharin. Keystone proceeds with heavily cautioned optimism, kneejerking toward keeping his promise (as we've found out how well he does that so far), however, he's still willing to help Kaylee. 

As a player, if killing Glith were the endgame, the game would have ended. Or he's not gone. Loose ends to tie up, at the very least. And breakfast pastry.