Let's see:
1. It doesn't have five seats.
The Transition is balancing on a knife's edge to achieve both legality under Light Sport rules and highway rules. The legal tangles are one of the biggest obstacles, really. One of the Light Sport rules is, two seats maximum.
2. It can't lift off vertically.
6. It's illegal and dangerous to lift off in the middle of the traffic.
Probably impractical in the immediate future, unless there's a fundamental technological development forthcoming. The only real VTOL tech we have is fan-based, and that poses safety problems for nearby vehicles and people.
Agreed. I would prefer another 30 knots at least for cruise.
I haven't actually checked those stats.
5. It doesn't fly too far away.
Sure it does. Just not all at once, same as any light aircraft. Don't expect to be crossing any oceans in it.
7. It requires a pilot's license.
So go get one, it's not that hard. Especially under Light Sport rules.
8. It's too light so you better don't find yourself in a car crash.
Highway crash test safety was one of the major regulatory hurdles. I'm presuming they came up with an acceptable compromise on that front.
10. It's neither electric, nor fusion-powered.
If you think this has a short range
now, just imagine how short it would be on pure electric....
11. It doesn't have an autopilot working during driving, lift off, flying, and landing.
You'll have to talk to Google about a "driving" autopilot. The rest can be done, it's just expensive to install the equipment. Also, the pilot still has to be at least competent and minimally involved for regulatory reasons.
12. It looks too nerdy to attract females.
If you can't attract females with your own personal airplane, you're doing it wrong.
13. It's not a submarine.
Excellent point.