User blog comment:Supahbadmarine/Too Many Loyalists!/@comment-1932673-20110606150904/@comment-1932673-20110606210458

Yes I agree with what you have said and the quote wasn't lost on me when I read the book, however, the Eclassiarchy has no control over the Astartes or their foundings, only the Adeptus Terra, and (indirectly) Mechanicus do. Neither does your logic explain why the BR geneseed is relatively stable. In addittion every time the Mechanicus has tried to modify geneseed, it has gone wrong (Cursed Founding anyone?) and therefore it is only logical that mixing geneseed would meet similar results, and any methods which have been used and succeeded (Honsou) would be too heretical to be granted consent by the Inquistion or the Adeptus Astartes (most SM would have a stroke if they knew about mixed geneseed).

Thus I have the following Proposals forn this issue: 1. Existing articles about mixed-geneseed Chapters be modified so that it is vaguely suggested that they may have more then one primarch (as GW's example of ambiguity on this matter should be followed) 2. Traitor-loyalist Geneseed should be completely written off as NCF as it is too contraversal, until GW gets it finger out of its arse 3. Loyal traitor characters should all be given a date of death or 'retirement' as will be certainly impossible for a non-dreadnought marine to remain in ACTIVE service for 10000+ years without being regulary exposed to the warp like the traitor legionnaires.