I have spreadsheet to generate analisis. Then I have several spreadsheets that
do further computations based on the part of this analisis. To do computation I
have to apply filter to analisis and take filtered data as the input for
commputation. 

You might advice me to use "Keep filter criteria" and Data->RefreshRange to do
automatic filtering. But I have to change filter criteria as many times as I
have additional spreadsheets that need filtered data. I have also searched
Database functions but they are not array functions (just DCOUNT or something). 

I would suggest to add array function FILTEROUT that will take data in the same
manner as AdvancedFilter and will filter out data and show as array. 

Let's take example for OOHelp (go Index and search for "functions; database"). 
If array on cells A16:E27 contained formula

=FilterOut(A1:E10; A13:E14)

and in cell D14 one enetered "> 1000" then: 

-- row 16 will look the same as row 5
-- row 17 will look the same as row 9
-- row 18 will look the same as row 10

and rows 19-27 would be empty.