If I need 2 weeks to implement a new feature, I need at least one more week to find better solutions which make the code easier to read. Then I would like to spend yet another week to think about other solutions to make sure I can't find one that is even better..

I hardly ever get that time but when I do, I create something beautiful..

The last time I was able to reduce > 2000 lines of code to a about 50 lines generic service which is easily extendable and understandable.

Do you include stuff like this in your estimations?