This doesn't change the fact that a piece of gear with agility, haste and mastery on it technically also has Crit on it. Which still makes it a worthwhile weapon for a Warrior or DK.
There WILL come times where a weapon will drop for a DW Frost or SMF Fury that will be a definite upgrade over the AP that a strength weapon will provide. This may be because it contains no other tertiary stats and is a proc weapon (see: black bruise) or it may just have a much better damage range and slower speed (see the level 60 1-hander axes: ttp://www.wowhead.com/item=18828) or possibly both. (See the Deathbringer and level 80 counterparts:
http://www.wowhead.com/item=17068).
Also remember that they've removed pretty much every single talent in the game that made strength scale up for everyone. No more additional 25% strength for warriors in 'zerker stance and so on, so while everything is going to need retuning that does lead to a pretty darn heavy hit to AP gains, as well as the AP gain from weapons is definitely a much smaller source of damage than the comparative weapon damage and the stats the weapon offers.