That's funny, Poetry's README [1] claims exactly the opposite (that it resolves dependencies better than pipenv). And looking at the git history, that section of the README is 2 years old, so that claim was made when you experimented.
Was the problem with dependency resolution you had similar to what Poetry describes in it README? Or are there other problems the README fails to mention?
The description they make got me interested, but up to now all alternatives I tried to build moderately complex python projects failed to deliver on their promises, so definitely interested in what you have to say.
[1] https://github.com/sdispater/poetry/blob/master/README.md#de...