Nominally, having your saddle just a little further back, and just a little lower than some theoretical "perfect" position, is just placing you in a slightly more comfortable position, rather than a maximum power position.
If your a recreational rider who isn't racing, and your happy with your performance then there's no need to change.
if you were racing and maximum performance became a goal, then moving the saddle a little further forwards and just a fraction higher could be desirable.
Personally I find having the saddle back a bit to be more comfortable (as most people do), yet I definitely find that it limits my ability to spin higher cadences. Moving the saddle forwards increases my cadence at the cost of placing more weight on my hands and shoulders.