We have antiquities system for some time now. Many mythic item equipments were introduced and another bunch of furnitures or collectibles as well.

Some of these grinds are horrendous. I cant confirm if the lead first codex entry has a higher (almost guaranteed) drop chance, but it seems so.Trying to get the second and third, working on completing the codex can be a pain. For example: elsweyr psijic portals, coral aerie final secret boss, some wb nobody visits anymore and can hardly be solo'ed, etc...
(I am myself waiting for that coral aerie one ages now, its farm is too time consuming for one roll; also I remember telling people the psijic portals were available in IA in zone chat and they were like:"REALLY!? I must go there NOW! TYVM!")

My suggestion is increasing the number of leads available in Filer Ool and Tel Var merchant to 4 (2 for mythics and 2 for furniture).

I'm not touching the ones that comes from treasure chests that every chapter have now (which i dont like btw).
I am also getting easy on IA's ones because I find the activity fun and I believe you'll be adding things that motivates people to do IA more in the future, which mitigates some of the farm.

Thank you.