Possibly a good time to bring up Snowfall key press. The Add-on changes the initiation of the action to the press of the key vice the release of the key. It's one of those out of sight out of mind add-ons you completly forget you have.
Just a mere suggestion about the utility of mind blast.
It's still a useful spell to avoid mind flay clipping before refreshing dots. So when VT has 2 second left, I cast mind blast (1 sec cast with appropriate haste rating) and 1 sec to cast VT. There in no way you can pull a 1,5 sec MF with regular gear and since most players has a 1,8 sec mind flay, 2 ticks require 1,2 sec channeling. Since MB does more dmg than a single MF tick, I use quite often.
Not that this thread has seen use for a while, but discussion about 4.0 mechanics should start in a new thread. This one will be locked, to avoid confusion of people looking for help and seeing old mechanics instead.