1. Change hunts from an open world event to something that requires pop items in the open world, delivers unique drops, and can be done with a maximum of 1 full alliance
We have fates for that.

2. Add random mechanics to the hardest level raid that forces players to adapt
Why? People would leave in frustration because if you cant see it coming you can adjust to it. there is also other mechanics that have random paths like Bismark EX with weather.

3. Add extreme mode of 4 man content
People would think of being a cool idea, but it would be a burnt out idea like wow's challenger mode and no one would care anymore.

4. Add Alliance raid content similar to alexander, have story mode and savage modes
wow already stated the problem with that: More content excluded to big Free companies, hard to make a scheduale for, and a whole new level of balancing and loot adjustment. that FF already stated that they barely make the deadline with the content they are giving out now.