Adding massive amounts of service costs a lot of money. It is always a bad thing if you see that anywhere in the world. It takes years for people to adjust their lives around better service, so your experiment will have data proving it was a wasted investment long before it works. If your city happens to do a massive investment despite my strong recommendation against it look close at the funding - if they don't have committed funding to continue that service for 10 years just ignore it as odds are too high they will cancel that service just as your start to rely on it and then you have to scramble to adjust your life (generally meaning buy a car - if you are car dependent you budget for the costs of a car, but if you normally use transit this is a sudden large expense that you probably can't handle).

Adding more service is a good thing, but it needs to be done in a sustainable way so that people can rely on it long term.

Sometimes cities will make massive changes to their network. By eliminating bad routes they can often find the money to fund good routes. This is a very different situation.