Hi Javier,
First, I recognize I am very fond of this aircraft so for question #3 let me say I am happy with what I got for my money

As for the complexity, there is indeed a long documentation but it is an interesting reading too. As an engineer I enjoyed learning (at last!) how some systems are built and linked together - no matter that this is no mandatory information for flying it.
Also, besides making IFR flights involving full FMC programming, I also use this aircraft for the EHM VFR world tour and I am happy with the results. For this purpose I use a "fast" checklist that takes less than 5 minutes from cold and dark to taxi.
Another thing to note is that when you buy the ATR you get both FS2004 and FSX versions. Also, as I started using FSX quite recently, I am not really confortable with the VC-only philosophy, and the ATR may be flown in "2D" cockpit more easily than the default FSXaircraft (due to a smart view system)
I cannot tell much about the delivery in Asia, but wherever you buy it from, I suggest checking where they deliver from. I noticed a huge difference between Flight1 who has a delivery center in Europe (bought from them twice, delivery was within a week) and FsPilotShop who has not (delivery took ~ 3 weeks).
Hope this helps
Andrei