DGSD took the liberty to change many facts from LOCH. For instance, in the original version of LOCH, Hong Qigong was the one who invented 18 Dragon Subduing Palms, whereas he now is merely one in a line of many chiefs who has the techniques passed down to him.
I believe the original version made more sense, and also gave Hong Qigong more prestige too as the progenitor of one of the best martial arts in Jiang Hu. It's kinda silly that a 20 year old Guo Jing could use all 18 palms, while Hong Qigong, who was much older at the first Huashan tournament, probably in his mid-thirties at the least, had not mastered all the moves.
Also, DGSD reduces the famed 1 Yang Zhi to the level of a water gun compared to L6SJ, so that kinda implies that Yi Deng was a second rate fighter using a second rate martial art compared to the DGSD Elites. Wang ChongYang traveled thousand of miles to trade his supreme invention for 1 Yang Zhi, while JiuMoZhi only had eyes for L6SJ, 1 Yang Zhi was not even worth trading for.
I believe these are changes on a much greater scale than the 3rd edition changes.