I would say the amount of time they use to develop SoF/TT/Solomon content is the most significant factor. Just take a look at the shift between 2012 and 2013. They introduced Sof and Solomon in 2012, but some of the quests in 2012 had most likely started development in 2011, way before SoF was introduced, Thus they were still productive enough to develop the likes of Firemakers' Curse, Elder Kiln, Song from the Depths and the signature heroes' double bills. Note how the quality and quantity of quests immediately dropped after TWW. It has now been two years they had been extremely unproductive. It couldn't have been a coincidence that this drop closely followed the introduction of constant SoF/TT/Solomon development. Note that this drop also followed the introduction of OSRS.
So instead of looking to cut quest graphic/audio etc, perhaps we should look at the other factors that caused this drop. Factors other than quests themselves.
17-Dec-2015 14:33:24