Why is development good?
If you can answer that, then you wont have to invent silly systems of evaluation that count the number of pieces developed. Instead you'll simply check whether the underlying factors are satisfied.
In chess those factors are typically king safety and piece activity. Activity is not merely mobility. A bishop on an open diagonal, a rook on an open file, sometimes those are bad pieces if they're only hitting empty squares with no ability to come into contact with something important in the future.
I like what Mr Emu has said. Chess is an exceptionally concrete game and there’s almost nothing that applies to *every* position. In general, development is a great thing, but in some positions you may need to attend to specific factors of the position at hand.