I really hope they sort some of these issues out but I doubt they will.
I was going to play classic 19's but when I discovered that the trade window (note item levels)
Shadow Oil on
Shadowfang and
Frost Oil on
Glacial Stone didn't work like it did for many years. Not even sure when this was changed on retail but it wasn't till like after MoP.
This was so damn cool, and wasn't an exploit imo. It follows the fantasy of the game : the oils require the user to be 24/30, but through the will not be traded can be applied to anyone's weapon.
These engine based things really change the experience of the game but I highly doubt any issues bellow end game will be addressed.
Still worth trying though - if you raise a bug report on the forums I'll bump it up for sure.
Windstorm Hammer is so big for rouges and warriors at 29.