I hit the accelerator all the time when I brake... It's call heel-toe downshifting ;) But seriously, it is nice to have an engine disconnect pedal convenient to prevent problems.
Almost all of the problems with automatics and manuals that people are discussing here are bull. It comes down to personal preference at this point if you enjoy shifting or you could care less what gears do in a car. I personally like the benefit no one discusses about manuals: It limits who asks if they can drive my car :P It also reduces the likelihood of theft :D