i just fear inquisitor will turn into something like infernal or hellfire, both of which are essentially useless talents, i hope that the dmg from inquisitor is more than worth the gcd you use on it, especially when you considering that it needs talent support to do properly fast aoe in hand of doom as it only hits targets with doom. it does seem that inquisitor can be used for ST dps as it has a 18 sec duration and a 25 sec cd atm, ofc the question will be if its going to be worth it.
also doesnt shadow bolt have 2,5 sec csat time on live? in
http://beta.wowdb.com/talent-calculator#m it says it has a 2 sec cast time, might just be that im missing a demonology perk and it has been added to the spell in legion.