Is Void Staff going to get a change as well?

/* I couldn't find any other posts on this subject matter, so I apologize if I state something redundant that can be found from another source. */

So with the preseason, Last Whisper received a fairly substantial change with the way that its armor penetration passive works, operating on the target's bonus armor rather than their total armor. My question is, should we expect a somewhat similar change to Void Staff since it still currently operates off of total MR rather than bonus? There's a possibility it will simply stay the same since APCs already have items that serve a similar purpose as LW's current upgrades. With Morello's inflicting Grievous Wounds like Mortal Reminder, and then there's Liandry's as a means to deal with targets that run with a large health pool kind of like how Lord Domink's Regards currently functions in-game. It seems in some sorts odd to me that Void Staff would be left alone and then proceed to alter LW as such. Mainly because prior to patch 5.22 they were essentially two sides of the same of the coin, providing raw AP/AD respectively as well as a 35% AP/AD penetration passive.

With that being said, it seems like power shift from a number of AD champions, though that might be the inevitable product of the extensive marksmen changes introducing a plethora of new items with critical chance and other various attributes. Though that's the reason why I've put this on the forums, I genuinely want to know what other summoners think of this design choice. Do you think this is a long over change that was waiting to happen, or do you think this is a change that won't positively change the landscape of the game? Thank you for taking the time read through this fairly lengthy post and remember, "Share your Opinion!".