Yes, I've dislike the 0 timer ever since they switched it. Giving troops such as Death the ability to insta-kill a whole team or a troop like Wraith the ability to insta-kill a troop every time he gets skulls isn't fun or strategic, it's just poor design.
Some people will say well what's the difference between that and devour to which I would point out that while devour can insta kill, that's it's only trick. It doesn't have the ability to stick around round after round so it's balanced.
Insta-kill Death Mark isn't a skill move, it's an automated nuke with no real recourse other than putting 4 impervious troops in your team which isn't a real solution (to say nothing of being boring).