The 'fixing' for so-called dirty GMSTs does not work properly in its
current state anyway, so it should be removed. Fixing the 'GMST fixing'
might not be possible, because whether or not a GMST is 'dirty' depends
on the language version of MW. Therefore different 'fixing' algorithms
would be required for the different MW localisations, and I do not see
a good reason why GMST values should be hard-coded in the GMST load
procedure. In my opinion, it only clutters the code.
Last but not least, I believe that it is not the task of the engine to
clean ESM files from dirty entries. That is a job for the modders, who
should only release clean ESM/ESP files in the first place. The engine
should not need to worry about whether a file is 'dirty' or not.
That is why I believe a feature for cleaning ESM/ESP files shall not be
part of the engine.