The law allow conscientious objection in doctors (for now), but also will justify death angels manipulating vulnerable people. We shouldn't forget that unbearable pain can be easily created with the appropriate medicines. People can be drugged and turn into addict puppets also. Has happened before. Even recently in US.
And that will taint the statistics also, removing a safety guarantee for everybody. Before the law, a warn was triggered when more than average people died in part of an hospital. After that, the hospital with an interest in lowering this value has a way to do it (falsifying consent). Protecting their public image, but also hiding any rotten apple present in their staff. Bad news for everybody.
If there is something that vulnerable elder don't need now is a new exception to kill them legally.