For any normal company, it would be a simple program to write. Disney checks if you have sailed with them within 18 months, if so, you are assigned the e-version. If anyone in your room hasn't, your entire room must report to the drill. The program shows on your TV (like now) at a time when it can correspond to the warning sound that those in the live drill will hear too. The app could clearly tell you which version is assigned to your room with instructions on how to proceed.
Then again, this is Disney IT we are talking about, so it probably would be too difficult for them. In the end, it really isn't that big of a deal. At worst, it's 15-30 minutes in a tight crowd in the warm sun. We will survive. In the past, it just meant I was at the start of a fantastic week and I never really thought twice about it.