Using the above methods, the first link is Live, the 2nd link is PTR. Just use the slider to set the level (i.e. level 49) and you can see that not only did the item get an ilvl buff like is being described for next patch, but the damage was also retuned (as well as the CD)
https://www.wowhead.com/item=13515/ramsteins-lightning-bolts&bonus=4052
https://ptr.wowhead.com/item=13515/ramsteins-lightning-bolts&bonus=4052