Regarding the issue with the Story sheet size being tiny, too small, this is a known bug already and is said to be fixed in 3.2 SR3 (so fingers crossed).
This happens only when the font size of Windows is set to higher than 100% (magnify fonts). In case you have a hi-res display notebook (1920x1080), most Windows 10 have a factory set for 150% font size. As soon as you set them back to 100% in the system settings (right click on Windows desktop) and restart Qlik Sense Desktop the next story you create will be okay again.
Would be nice if you rate this as "helpful answer" ;-)