It's really a bad thing? Yes, in my opinion, but what do you think? When I invade I always have Humanity as a hotkey but I only use it if the enemy uses an Estus (or Humanity too) in the middle of the duel. I really think it's kind of lame because it takes the out of the place the thing about death. They could flask all day, I would have to backstab, which usually doesn't kill them in 1 hit, so they heal again, or I would have to use a Lloyd's Talisman, but I really have to? I mean, this is a duel, a true fight between warriors, to me, healing in middle of the battle, it's kind of a cheat and an insult to the opponent. It's okay if you use Replenishment (or Sanctus), but no heals of any kind please.
You disagree? Post your opinion below.
If it's a random invasion, I don't care if he heals or not, because he didn't ask to be invaded so he is in all his right to do so.