We both could (have) and did split up so many labels/companies, already. As long as done thoroughly and with expertise, I surely appreciate. But in (too) many cases, that's been/is being done somewhat unmindfully and/or simply (mis)interpreting (partly incorrect) discogs introductions.
As obviously/partly leading to incorrect attributions, one of the main problems seems to be cat. no. logistics being shared between various (sub)labels, local branches etc. operat(ed) under one company roof.
Both above are reasons why I a) diligently strive to add releases to label series, but only do so if such both exist and apply, and b) only attribute labels, subcompanies etc. after thorough investigation *, but (feel obliged to) revise such if encountered.
So, yes, things could partly be easier with less diversification...
(*) or being able to back up own knowledge by respective sources