Again, I would like to point out the fact that mines is, by far, the most non-linearly scaling damage ability in the game (most abilities follow a mostly linear increase in effect with each talent point). At rank 1, it does ~22% of the max damage/cast, at rank 2 it goes up to ~52% of the max damage/cast, at rank 3 it does a whopping 89% of the max damage/cast, with rank 4 obviously being 100%.
The only context that's relevant is the damage scaling of other abilities. It isn't provided, but it doesn't need to be unless you are arguing that other abilities are not in fact mostly linear. Is there any reason for mines to be so relatively weak at rank 1 and rank 2, yet so strong at rank 3? This aspect of mines has never made sense. And this argument is dismissed as 'scrub talk'? No. You guys arn't even trying.
Yes. It largely would. If the arming time is increased, so is the time that the other players have to move. The skill is changed drastically.
They have more time to move. So what? They still have to move. An extra quarter of a second of arming time (to pick a number at random) doesn't mean they only have to move at their leisure.