D&d being better for destroying farms / oil platforms it gives good opportunities to cripple the enemy player.
this is a myth which has been empirically proven to not be true by Nedro. Death and Decay and blizzard both do the same damage to every type of building (2x2, 3x3 and 4x4 buildings). This is a myth put forward by the old occult site war2.warcraft.org/strategy (no longer accessible).
If you look at the battle.net site of warcraft 2 strategy, where they discuss blizzard and death and decay, there are no such myths being put forward. The myth being that D&D does more damage to 2x2 and 4x4 buildings and blizzard does more damage to 3x3 buildings. It is not true at all.http://classic.battle.net/war2/advanced/bdnd.shtml
It is true there is no stopping an invisible transport but you cant really stop a hasted transport either yes you can see it coming and prepare for it but if there is a hasted dk in it the potential damages are much higher.
Haste does not affect a transport. If u haste a transport and u have another transport next to it without haste, they both go the same speed (I just empirically tested this in single player).