if you have +0.1 movement on armor, it is considered a bonus not penalty. Armor specialist is then useless.
That's my point--with low level crafting (1-2 points), I was able to get my heavy armor to go from giving a movement penalty to giving a +movement bonus, making 1/2 of the benefit of Armor Specialist useless.
As it is, the crafting boost turns ANY movement penalty into a +movement bonus. So with 1-2 points in crafting, I can improve a -500 movement penalty armor into a +.1 movement bonus, just the same as I could turn a -1 movement penalty armor into a +.1 movement bonus.