Actually, the bomber would die if he choose to take two people with him. It's time for mafia history.
The suicide bomber had it's start in Mafia 5, I believe. In that game, he automatically blew up on Day 3 and took two people with him. I think there was something else to the role but I forget all the details.
In Mafia 6, the role of the bomber was increased. In that game, everyone who voted for the bomber would die. And it did end up happening. We lost like 5 or 6 people in one go. That was fun. The bomber also had the option of killing himself and two other people at any time. And if anyone hit the bomber they would die.
Mafia 7 was kind of wierd for the bomber. In that game, Pale made a whole mafia of bombers. There were some differences. In that game, if one of the bomber's was voted for, only one person at random would die with the bomber. Also, if the bomber mafia made hits, there was a chance they would blow up with their hit. If anyone hit a bomber mafai member, they would die with the mafia member. All in all it was more different from what we've seen.
Mafia 8 was hilariously sweet. Zach knew that one person was going to be hunted for after some of the chaos in the previos mafia game, so he made her the suicide bomber. We lost like 7 or 8 people on the first day because they voted for her. Basically though. The bomber role just followed the one outlined in Mafia 6.
Mafia 9 introduced a new wrinkle. In that game, although the role was the same as Mafia 6 and 8, S-U-P-E-R gave the bomber a nemesis. That person acted like the killer in this game and was the only one who could successfully kill the bomber. However, once that person killed the bomber, he would lose his killing abiltiy and just become a townie. I was the bomber in that game. My first time as such and I ended up getting hit by the killer on the second day. It was his first hit and it was just a lucky one at that. He even said after that he wasn't trying to hit the bomber, he was just going for someone at random.
So, for this game, I took all of this into account. I kept the bomber role basically the same from Mafia 6 and 8. I still gave the bomber the option to end his life and take two people with him and I liked the idea of the killer being the only one who could defeat the bomber. However, remembering how it sucked that I didn't get to use my ability in the last game and that it is pretty long odds for the bomber to win the game, I added the wrinkle of timebombs. Personally, I like the result. I think it might be the biggest legacy I make to the game. Plus, I hoped it would prevent some bandwagons and add some more fear.