Depends on how you mean the question. ancient DNA analysis has settled that the first two plague pandemics were Yersinia pestis, so if your question was on what kind of bacterium caused the Black Death - that is Yersinia pestis.
If it is about the manifestation of the disease (the clinical symptoms), those we only know from historical descriptions and that is not something a model can change :-). So yeah, many infected people would still have had buboes. Buboes are also the expected result from plague acquired from fleas (whether they were human fleas or rat fleas).
What might be less known is that there is a pretty high chance (10-20%) that a person suffering from bubonic plague progresses to pneumonic plague. That basically is a death warrant for that person, but it also means that he/she might spread the disease further through air-droplets. If the conditions are right, you might get a pneumonic plague epidemic intermingled with a bubonic plague epidemic. Model-wise, that is one scenario we haven't looked into, but we have seen something like that play out in Madagascar last year.
If it is about the manifestation of the disease (the clinical symptoms), those we only know from historical descriptions and that is not something a model can change :-). So yeah, many infected people would still have had buboes. Buboes are also the expected result from plague acquired from fleas (whether they were human fleas or rat fleas).
What might be less known is that there is a pretty high chance (10-20%) that a person suffering from bubonic plague progresses to pneumonic plague. That basically is a death warrant for that person, but it also means that he/she might spread the disease further through air-droplets. If the conditions are right, you might get a pneumonic plague epidemic intermingled with a bubonic plague epidemic. Model-wise, that is one scenario we haven't looked into, but we have seen something like that play out in Madagascar last year.