My copy of the 35 1.4 also has a fairly loose aperture ring, my 18mm on the other hand is pretty stiff. It's only been an issue for me when taking the camera in and out of my bag.
The main thing that I think makes the X cameras feel cheap is their weight. I initially hated the "hollow" feeling, but while magnesium is very light it's also very tough. My lowly X-E1 has had drops that would seriously dent or warp a brass Leica M and just came away with scratches. It's been accidentally kicked across a room against a marble wall, dropped down stairs etc. - hasn't got a single dent or crack, just paint loss and scratches.
Honestly I would just get used to the weight, it might not feel as "significant" to hold as an M but the weight doesn't come at the expense of strength or durability. Some evidence: http://charlenewinfred.com/2014/02/2...-fuji-x-pro-1/
(my X looks at least as beat up)