Dusan, you can't expect Totti at this age to be fast, he's almost 34 years old man. Add to that the injuries he's facing, his situation is pretty similar to Del Piero. At this age, you don't have to look at their speedy legs but what they add to the team.
Totti is a brilliant goalscorer, be it a slow Totti or fast Totti. He's a quality player up until now and capable of making a difference even in his worst days. His vision, his passes, his shooting etc, why don't you look at these instead of looking at how slower he has become? It's only normal that players become slower. Like Zidane, Del Piero now, Romario before and so on.
And saying he's nothing is a poor thing to say man.