Below are listed the 'next big things' on the roadmap for ag-Grid. During the development, other smaller items will be included. The next major release of ag-Grid will be released once one or more of the below are complete. All of these are being developed out in coordination with large ag-Grid clients including one leading investment bank in London and one leading fund management company in Canada.
Modern reporting tools show filters in a panel, so you can interact with a set of filters concurrently. ag-Grid will allow this option by having a 'pinnable' option on the filters, which when clicked, will move the filter to the tool panel (the right hand panel that currently has column management). This will allow the tool panel to host and display multiple filters concurrently.
We are constantly refactoring and making things better. Expect the whole grid to be face lifted on a continued basis.