I wouldn't count on it. Riot likes to throw a bunch of stuff together and slap it into the live servers; then once enough players lose dozens of games hand over fist because of that nerfed item or champ or this op item or champ, then they'll step step in after a month or so and "balance" with patches.
90% of the stuff they put out into the PBE usually makes it to live in some form or fashion, cause their development team are thickheaded and stubborn and think all their item concepts (health item nerfs) or champion designs (Camille) are awesome sauce and make league "fresh and exciting"
Except, it's not exciting when you're trying to play something like a maokai or nautius versus a team comp of 3 or 4 ad crit dps Insta killers and or 2+ burst mages in one game. And you're like ... "Shhhhiittttt I gotta peel this squishy ass team from all that? Fml."
It's ludicrous when you get Instagibbed by a comp like that when you have 6 full tank items but still get like 2k damage dealt to you in around 2 or 3 seconds. As veigar would say... DELETED!