One advantage of the shorter neck/strings is a more punchy or tighter tone and a very full bass resonance at all fretboard positions, which the longer necked version sometimes missed. Without the active EQ, there's no battery to worry about going flat leaving the guitar silent and the weight balance is much better for my neck and back. There wasn't a huge difference, weight wise, but the shorter neck makes the guitar more like a standard strat in terms of balance and in simple terms it's easier for me to play and that's always an important feature of any guitar.
Tried it today through the Hartke Kickback amp and I loved its smooth sound. May change from the Fender .040 - .095 roundwounds it came with to an equivalent short scale flatwound set as I prefer flatties for their smoother tones and they're also less distressing on the pinkies - any suggestions as to which set to go for?
Our club's end of term bash is this Sunday so I'll be using the Squier Jag in some of our band sessions and we'll see how the neck and back cope with a long'ish event.

Regards,
Martyn