I really like how you separate both hard to get and easy to get items, when I started reading this, at first I was worried this was another thread that was so hardcore for the sake of being hardcore it thinking players who aren't, shouldn't play. But after reading the whole thread I have to agree, that you raise some good points...
I hope that there will be gear that takes a lot of work to get, and by a lot of work, I mean it... I guess you could "tier" items (colors seem to work from other games) - but I'll use numbers in this case:
T1 - Normal Items, very common
T2 - HQ versions of Normal items, common
T3 - Rare Items - not very common, but still available with enough work put into it - 10% drop rate
T4 - Very Rare Items - not common at all, lots of time and effort put into getting these items. Drop rate varies with weather/day and items drop around 1% of the time.
T5 - Ultra Rare items - items that have a less then 0.1% drop rate - players might have to meet special requirements to have a chance to have the item drop. Quests, Company Rank, etc...
T6 - Impossibly Rare - items that have a less then 0.00001% chance of the item dropping. Mostly these items would be so rare that special events might increase the chance of getting the item in and of itself.
With more and more harder to obtain items working off of drop rate, jobs like thief would really come into play if they had traits that increased the drop rate of items on mobs.
Anyway, the above is just some random examples, so take it for what you will.
