I've heard that it works from enough people to believe it, but will it be 'fixed' with 1.4?

doubt it... most bugs aren't
"The Black Star" still traps white and black souls
Destro element +dmg affects element enchanting
+Fear effect illusion perk adds fire damage to your destro fire spells
+ Loads more.
They are only worried about fixing glitches that prevent progress... they don't care about exploitable glitches
Besides... follower should lvl w/ you in the first place!