I think there is consensus that the Falke is not the world's best glider - indeed that motor gliders in general need a pretty good lift day to go any distance sans moteur. On the other hand, as compromises go they have a lot to commend them. Low operating costs compared to most other forms of flying, great touring capability and some nice handling usually feature.
I'm not sure whether EFATO in a TMG is worse than a cable-break; there's certainly more time to think than in yer average SEP. Whether to land ahead, land away or attempt the impossible turn are all options in any aircraft. The outcome must surely be significantly down to currency and training which hopefully will - to use the vernacular - inform the decision-making process.