Thank you for focusing on the filtering system. From what I can see, it's the most under-used feature of the current system, and it could really use some attention. In particular:

# Allow users to save filters

Have the existing filters way up front, together with the button for creating a new one. Make it easy for me to jump straight into the filtering modes where I am most useful, and to switch to the next such mode once I'm done with the first one.

# Pre-set dupehammer filters for users with gold tag badges

or at least offer it as a suggestion. If I have a gold tag badge and you've given me a dupehammer for it, presumably it's because you trust my judgement about duplicates on that tag, so by extension you think that this is where my reviews would be most solid and most impactful. Dupehammer reviews, if presented early, count quadruple, and they're a great way to get a queue into shape. Let's focus this attention where it counts the most!

# Use closing history (and not just answer activity) when suggesting filters

On my main site, I rarely answer homework questions, but they make a large proportion of the questions I vote to close. (The community consensus is that the tag is on-topic but with clear guidelines on what is allowed, and many new users post off-topic questions, which I consider to be quite harmful to the site.) While there *is* a correlation between the tags where I'm active answering and the tags where I feel comfortable casting close votes, that correlation is insufficient to predict my future voting behaviour -- you need to look at my past closure voting history to give the best predictions.

# If you can, point me to questions that *should* have been tagged [tag:tag]

In addition to the above: few new-user off-topic homework questions get tagged [tag:homework] by their authors, and this takes time to add. But I'm willing to put some money down that if you throw some data science at it, a reasonably high percentage of new-user questions tagged, say, [tag:newtonian-mechanics] will end up closed and tagged as homework. Give me a filter for those, please.

# Allow me to filter on off-topic sub-reason

Same as above. Reviewing for closure requires different mindsets depending on why the questions were marked as off-topic, and you already have the data to make that separation.