<prompt> Translate the following text to EnglishJambo muhimu zaidi lilikuwa mabadiliko katika umbo la puck kutoka kwa urefu hadi mviringo, ambayo iliruhusu kiwango kikubwa cha udhibiti.  <response>: The most important of which was the change in the shape of the puck from elongated to spherical, which allowed for a greater degree of control. 