Hello! A minor yet, important step would be updating the field and game properties for speed duels. Basically, the speed duel field has the same properties as the master duel field. There has to be deleted 2 divs from the S/T zone, main monster zone and the extra monster zones plus adding one special zone, prefferably above the extra deck deck zone, for the skill card.
And speaking about the game properties, it would be efficient if game properties like 4000LP and 4 cards in the starting hand changed automatically if you select speed duel rule which can be easily written into the code at the section that includes speed duel properties