Right now, one of the chief complaints levelled at the show is that it can be quite formulaic; though they managed to move past it somewhat in the second season, there was often a basic recurring set up across each episode. Barry would investigate the villain, and fight them; he’s incapacitated during this first fight, for reasons essentially linked to his own incompetence, and by the end of the episode has learned how to get around the problem previously posed to him – usually the solution is, of course, some variation on “go faster”.
It’d be difficult to take Barry and Wally seriously if, between the two of them, they’re consistently beaten by the same formula. The show would need to shake things up, possibly dramatically, to present scenarios that retain a level of dramatic weight – after all, both of these two individuals are exceptionally fast. That between two of them they’d struggle to take down petty thieves is, to be honest, somewhat unlikely.
An article I wrote for Yahoo; it’s all about Kid Flash, and how his inclusion as a character might change or influence The Flash.