There is no specific DSDT for BIOS v48. The one used here actually is for DC3217IYE. I haven't cracked how to make one. If you do, please, post it here!
The DSDT on this build is used just to get sound. There is no other hardware which it makes 'better compatibility' DSDT edits provide.
With regards to sleep I don't use much of it. I use NUC to track changes on classified ads website and to reinsert my add when it's not on top of the list. So it is always on. I tried sleep now. I pressed power button then selected Sleep button from shutdown dialog. While I did it the system shutdown my MixroXP virtual machine. Few minutes later I pressed spacebar on my bluetooth keyboard and it did wake up without fuss.
I never experienced any freezes or black screens. I have been using NUC since 10.8.0 and January 2013.