If Bronsan was in LTK, I think the core story would have been roughly the same (Bond goes rogue to seek revenge for a friend), but the tone of the movie would have been a bit lighter.
Then again, Licence to Kill
is, arguably, my favorite Bond film, so what do I know?
ETA: Then again, it is not like the plots for Bronsan's films were all that much better or worse than Dalton's. YMMV.