I dont understand the controversy around the update. Get the items as you need them. The arms and towers are only like $60 thats a deal IMO as Ive seen some single towers cost near that by themselves for other vehicles. I plan to get the arms and towers when I can but Im gonna wait on the chassis until I need a chassis.

Why would you ditch the car and buy another because there are hopups available for your current ride? I bought the car just a couple months ago knowing the new parts were coming and figured just like I said in the paragraph above I'll get the arms and towers and wait till I need a chassis to replace it. I think its actually very cool of AE to have these updates and update kits rather then holding back and releasing a whole new buggy every year or so.

Manshoon 20t with a 2200kv motor sounds too high to me. I'd be thinking 17-18t but Im just an amatuer when it comes to this electric stuff. I run a 20t on my 1900kv and its smoking fast. As for your diff question I think lowering the rear diff to 3k would be my first choice. The lighter rear fluid will help turn in and give more steering. Thicker fluid fights against the inside and outside wheels in a turn going different speeds. If you went to 7k in the front it would probably reduce off power steering but pull better out of the corner.