Most people I have seen play this game - myself included - quickly picked up on the clock mechanic. Even if it is slightly confusing, I don't see that as a problem. This feels like the kind of game where slowly learning and understanding the mechanics over time is actually a plus, rather than something frustrating. Also, time management felt like a very core part of the game. This generic bomb system is not only more shallow and less unique, but in my opinion more boring and an antithesis to what the game was.
This is just my opinion, so take it with a grain of salt, but I think the bomb is the wrong direction to go in.