It's highly susceptible to change; it's labeled as "EXPERIMENTAL", and it's definitely not the first ostensibly radical balance change they've tested. I'm not sure quite how the changes would play out if they did ship, but I'm going to wager that Riot will be able to leverage the changes pretty well.
Although, I do have to agree with (what I hope is) the consensus - it's not a great idea to turn Banshee's Veil into an AP/MR security item that retains its' spellshield. I think Edge of Night has provided a case as to why it may be a bad idea.