Why do you say it needs more time in the oven? I've had zero issues with it as a drop-in replacement for Pip in a large commercial project, which is an extremely impressive achievement. (And it was 10x faster.)
I tried Poetry once and it failed to resolve dependencies on the first thing I tried it on. If anything Poetry needs more time in the oven. It also wasn't 10x faster.
Not really. It will predict more vulgar output but that is fixed by fine tuning. It's not going to "poison" it in any meaningful sense.