The different sized screens would be a problem, actually releasing the 3DS with 2 different sized screens was one of the dumbest design decisions I've seen in a while, I don't know what goals they are hitting when they make these odd design decisions.
I doubt it. Pretty sure you won't be finishing Trace Memory/Another Code on this....
Nintendo has a really good position to go after the tablet market here.
It had absolutely nothing to do with the lid closing - you had to physically close the clamshell just enough to reflect the bottom screen onto the glossy coating of the top screen so it'd overlay an image onto another one and let you solve the puzzle.Wh-- Why wouldn't the sleep switch act as a lid closing? Multiple things from the stock 3DS were kept for 2DS for software compatibility reasons (see: 3D cameras).
Also, from the comparison spreadsheet:
2DS: √ Sleep Switch
3DS: √ By closing the console
3DS XL: √ By closing the console
It's time to go back to basics.
Yes but the GBA SP came out a decade ago. How expensive can an extra speaker be.