Well, by now we should all have learned that if we want a 4-seater with mission capability, we need to buy a 6-seater. It's unfair to criticise any aircraft for not being capable of filling the seats, filling the tanks and go 1000nm. There is no aircraft that can do it.
The Tecnam is no exception - it's a 2 seater twin with full capabilities, or 4 with less. That's fine by me as I fly on my own 90% of the time. I feel that unfairly, just because it's a twin, it gets compared to Senecas, Barons and King Airs that have over twice as much power. It's not that kind of aircraft. It's reinvented an old class and should be compared the long forgotten Wings Derringers or Miles Geminis, rather.