I've spent 3 weeks away from mtgs researching TTATT and this was my first mtg back, for family reasons.
The hall was very low on answers, the conductors wife had to answer about 10 times. Think the whole thing fell very flat. I failed to see the scriptural backing for this parable only applying to the anointed especially after 1919 and the master returning after the great tribulation. I didn't understand how the two slaves who did well we're 'literal' representations of the anointed but that the bad example was only figurative, as a warning. There wasn't a clear scriptural link to the preaching work as implied.
i checked some none jw bible commentaries and their explanations made more sense, some see the talents as any God given talent we all have, and some as the Christian faith we've learned . In each case the lesson is we should do our best to use our talents to the best, abounding in Christian works (not necessarily preaching), but kindness to fellowman etc .
this made more sense to me and think it would have encouraged the cong more to be applied to each individual directly, basically use what you have to be a better Christian, generally in conduct, good works etc, instead of being used just to induce guilt to do more hours
It seems to me that the GB used the illustration to promote themselves and to promote the preaching work of JWs, without clear scriptural backing for either.