More important than jobs, the interface, or version 2.0...

[Jinko]

1.The game is still going through major changes there is no point rebalancing mobs now as the job system and possibly refinements to armour will change it again.

2. Yes there is a lack of challenge at least untill end game but im sure this will be address before 2.0, I don't think its such a bad thing to make the game easier to reach cap anyway, I agree that lootable equipment is somewhat redundant with the addition of materia but it looks like nothing is being done about that.

3. See above.

4. In patch 1.21 they reduced the amount of material a node can give per action and will probably fine tune this before 2.0 hits.

As others have mention the lack of content is the main problem at the moment, this should change with 2.0 because the team will no longer be split between two versions of the game and more resources will be poured into keeping end game content flowing.