1) Publish bug fix or improvement as soon as known with a short description of the problem, a short description of the solution and the code of the fix/improvement
rather than collect that staff and publish hudge upgrade patches that could content 80% of code that is related to features not used by some of your "clients".

2) same like 1)

3) same like 2)

4) same like 3)

5) Create a searchable repository for these fixes/improvement

:-)