At this point it's hilarious. These heavy attack nerfs will obliterate magblade's whose major attack is a fire staff heavy from stealth canceled into spammable of choice.
It basically renders ranged magblade completely and utterly untenable.
Melee magblade sucks compared to stamblade because most of the squishiest players (the only ones a magblade could conceivably kill) are other magic users who have both high spell resists and 5-7% magic resistance from light armor passives.
In addition to this the concealed weapon speed nerf means we'll lose 10% speed because a lot of ranged magbaldes slotted it purely for sneak speed.
So, in conclusion, magblades now do less damage, are slower, and will die quicker... Whilst stamblade's execute was buffed.
Much lols Zenimax.