I have been playing in IC on PTS (and you should too!). I was initially not happy about the changes since kiting was part of my playstyle. One noteworthy thing about Imperial City is that it's a city consisting of alley ways and roads, confined space, so bolt escaping all over the map is a quick way to get yourself killed. There are tons of adds all over and I have found that roll dodging has been a lot more preferable and controllable. Your going to have to adapt your playstyle, but I don't think the Bolt Escape adjustments are the end of the world anymore.
Outside Imperial city, in Cyrodiil...well that's another story.