yes and no... as far as i know, the AI will act smarter and try move towards point of attack... problem is, a rogue that goes down the thief tree, has a action and two bonus actions, meaning you cant really catch them... secondly you have improved invisibilty ( i asume it is in as 4th level spell ? ), and you can also use haste, extended haste, wich gives you a real extra action...
At this point its speculation, but it do sound like there is improvmenets to the AI, and that is the only saving grace that can fix this or partly
Well it doesn't have to be perfect. As long as you have to move around and the mobs try to find you and has a chance to do it is enough maybe. Right now it's so much quicker to do the exploit than normal fighting since they skip their turn. There has always been good to kite/use environment for cover/hiding etc in many games, but normally it takes longer than going in close and hitting them in melee.
