Usually, soft-luxury vehicles don’t make for great performance cars. For instance, Lexus has never attempted to make a souped-up variant of the ES mostly because that would involve more than just changing out the suspension, adding a more powerful engine and bigger brakes. Doing so would not even get them close to being in the same league as a BMW her, for instance.
Acura, which literally sells rebadged Hondas, has somewhat tried to do this with the TL by giving it SH-AWD and performance-oriented tunes/tweaks here and there; but the effort is still way short of what BMW has to offer.
The mantra for most automakers, in my opinion, should be “Do one thing very well. Do it better than your competitors.” You get the idea.