NPC to Lock your XP/Level

Hello first time ever posting… I was hoping maybe blizzard could add the npc from wotlk thats in sw that a 19 twinks npc that lets you lock your xp it would be amazing for classic with all the level phases making twinks is amazing and you can make builds you couldnt before i know alot of people dont like twins that much but overall it would be sick if it happened and it keeps the old brackets alive, i made a level 19 twink in phase 1 as everything was mega cheap and im playing on making my 25 hunter from phase 1 a 29 twink and then maybe make a 39 this phase and 49 next but yeah basically please add the npc to lock xp

Seems like a very straight forward thing to do with zero downsides.

nah they ruin low level bgs