I'm all into making modern looking settlements and the heck to the alleged "non-lore friendly" aspect of my settlements. Because of the detail I go through in making these settlements and the fact that more often than not, I may delete an item which will destroy previs and precombines, I have not shared any of my Settlement Blueprints as they will most certainly impact a persons game, and hell hath no fury as a pissed off gamer. So I asked a modder if it was possible to include with a Settlement Blueprint an esp or esl where I have initially just scrapped the entire settlement including all previs precombines and navmesh ("PPN")info in all settlements, then rebuild all the PPNs in the Commonwealth, and then creating my Settlement Blueprints in that redone commonwealth. I would then upload the Blueprint with an esp or whatever covering that specific settlement so when the Blueprint is run with the esp it will not impact the whole of the Commonwealth. It's a nice idea and the mod author said it could be done, bu it is way too much work and most people have already messed up their games limited optimizations.
I wish I knew enough about the CK to be able to just create settlement replacements where I can simply fix all the PPNs in that build and release it as a replacement, but, as another commenter indicated, I am excellent at in game settlement building but have no talent when it comes to the CK. Plus, the CK ids SOOOOOO SLOOOOW. I am jealous of your ability.
You can check out some of my pics of my settlements I have posted for ideas (or some eye candy as I do have a fully functioning stripper pole in all my bars).
Bottom line for you I think is to just go for it and test it yourself. I am not sure anyone has done what you are proposing. I have heard of someone working on the entire Commonwealth to make broken PPN's a thing of the past, but I am not sure of all of the details.
Good luck with your project.