Since the new 'Quest Book' system was implemented some weeks ago, a few bugs have been fixed, but there is one serious problem in my opinion. That is being locked out of quests because your level is too *high*.
Here is what is wrong with that picture:
(1) Using myself as an example, I was already level 23 before the implementation. But some 'long chain' quests can only be completed by level 21 players, & others can only be completed by level 22 or 23 players. By the time I had completed the early parts of a 'long chain,' I was promoted to level 24 and up, and was locked out of the later parts of the chain.
(2) Even players who started the game after the Quest Book came in, are currently able, without level restrictions, to do the early parts of several long chains, before they discover they are locked out of finishing the chain because their level has become too high. This can happen because they gain experience from clearing the island or doing their first adventure before they reach the quests that have level restrictions. In many cases, they have paid resources that exceeded their rewards during the early parts of the chain, but are unable to get the nicer payoff for completing the whole chain (such as a noble deed). While people were completing the early parts of a chain, perhaps they did not even realize there were level restrictions to finish the chain. Because the level restrictions were not disclosed from the beginning -- who is going to hover over a quest with a lock on it and read the 'tool-tip'? -- players who paid resources and cannot finish a chain should be *refunded their resources* if you are not going to lift the upper level restrictions. That is simple fairness and equity. The opposite is called 'bait and switch.'
(3) Maximum level restrictions for quests, or narrow ranges of levels for quests, are unreasonable in and of themselves. Players have different styles of developing their island, different emphases on resources & weapons, and not everyone can be expected to fit into the program of developing what you are asking at a specific level. You should revise these, especially in the case of single level quests with no range of levels at all (such as 21 - 21, or 32 - 32). In my opinion, a minimum level for a quest is fine, but there should be no maximum level for any quest.
(4) The 'Main Quests' section of the Quest Book remains cluttered with quests that can never be completed once a player is past a certain level. If you decide my argument is invalid, then you should make it possible to remove this clutter. I do not want to forever be reminded that there are quests I didn't complete and can never complete, and I do not want to navigate around the clutter. If this clutter was removed, I would not have to scroll my Quest Book at all.

