I haven't used MagSafe2 yet but MagSafe1 on my 2011 Macbook Air 11" is too strong. When you pull from an angle it just slides the laptop with it. I would guess that's what Apple is trying to fix with MagSafe2. It may not be much of an issue for the heavier laptops but going forward it's likely laptops are going to continue getting lighter -- not heavier. I think the benefits outweigh the drawbacks here.