True. The resale value will deter a lot of people from an excellent car and brand. I think this is one of the most exciting cars in its class but will wait for the prices too drop...
I would rather take the BMW or Merc equivalent. The resale value on those will be better and the base price seems more attractive. Will wait to see prices of the Alfa a year after launch.
If you are going with the M135i make sure it's the ewg model. Personally I would go for the M140i. From my research I think this newer spec is a bit quicker in stock form and not just 15hp quicker. Also would the prices of the older models not fall substantially when the new one releases...
Yes just flash back the original software and you wont have a problem. Or just do the normal update.
Watch out for factory resetting a jailbroken device it will hang on the reset.