fix the filter. It is now extremely slow to filter a column.
When you open the dialog box to filter, the cursor is in a useless box instead of where you can type. Once you start typing to filter, you have to wait a ridiculous amount of time between letters or numbers on a sheet with 9000 rows. And this with 16 GB of ram, 2.6 core i7, and 1 TB SSD. Filtering was much better on 2011.
D McKean commented
This is also an issue with filter-as-you-type (auto filter?). This would be a lot more useable if it didn't filter until I press a button or hit return. Button/return may not be convenient for most uses, but it makes filtering larger sheets even more difficult than it already is.
This is a multi-threading issue - it's 64-bit but not yet utilising multi cores. Please use your votes on the multi-threading ticket