Well, say the rumour is true you know know why they did away with traits. To make more marine codices and ignore
DE, eldar, necrons and the inquisition (though I suspect they'll be on their way at the end of 5th to become useless in 6th).
All
GW really need to do is stick a load of chapter tactics in there instead now to enable people to make variant marines. Personaly I liked the traits idea and had ben planning a scythes of the emperor army with the restricted terminators/dreads choices and less
FoC options as drawbacks, and a nartheculum or however it is spelled in each squad. They need the gene seed back for rebuilding after all

. Think a second option was special weapons instead of heavy weapons in
tac squads too.
They should really just get off their profit margins and obsession to sell even more space marines and knock out the codices that NEED an update. They want variant marines just add chapter tactics for people to choose from in a white dwarf, someone will stick it up on the ent in a pdf for us with more sense to give
GW that much money for what should have been toilet paper.