Honestly, if you lose internet connection - how many people will be able to regain it and reconnect to the game in 1 minute? That'd be useless for most people. I don't think five minutes is that long and I don't think it's asking a lot for you to wait five minutes in order to finish your attack. I agree that it would be better if they allowed you to do something else during that 'pause', but I don't think it's entirely necessary. Get up and go get a drink - bam, five minutes over.
"He uttered the word of curse, crush him with our Orcish iron!"