It's easy to see that for about two weeks there was the opportunity to move in, with the help of the Viennese rebels we could have sandwich the imperial troops, and beat them badly. Way earlier somewhere above ITT I wrote we could have caught Windisch-Grätz with his pants down, but actually we could only win when he - and more importantly his army - wasn't present.
There are no guarantees the battle would have went swell, but we could expect. The debate is largely revolves around "the should have, could have" nature of the possible early intervention. Just the same as what they did back in the day.
This is definitely one of the major "what if" nodes in the Revolution and War of Independence of 1848-49.