It's survival not creative. A solution is good to change a certain block but if you want to change the whole construction then start again from scratch. You have to think and plan before you start building. If you build in real life you have to choose the right material, right?
How many times will it happen that a builder chooses the wrong texture ? Best solution so far is from Ozorvals. It's good to brainstorm but Red has already enough on his plate to get version 1.0 ready, so no distraction needed.