I think crafting can be a viable update if done right. Items need to be damm good.
I also thing it on its own is not enough. We need real content. As in places to go and things to do. New encounters new mobs new fights. For some people that means T5. Ive yet to see all of t4 so im sorta meh on that.
Adding unchained versions of things is NOT new content. Its a stop gap measure of reworking in some cases 6 year old content and adding new pretties for ppl to get. To me thats "modded" content.
T5 AND more 6 mans AND a new zone IS imo the content that is truely needed to keep players engaged.
However i think we all know Funcomm doesnt have the resources. So unfortunate. Its such a wonderful game.