I saw the Ezra speeder today. The light saber in the one I saw looked a little flimsy, so I passed. But I did notice that this version of Ezra has the scars on his face that he's had since late in season one of Rebels.
I picked this up last week and it's a fun toy. Nice detailing and doesn't feel as cheap as some other vehicles. The blade is removable from the hilt, that may have played a part in the flimsiness you saw. The blade and hilt can be stored in the rear compartment where the engine should be.