Very likely the reason WinExpert includes EC1118 in many kits is that it is pretty much a fool proof yeast. They make the kits for the "masses" and have no idea what the individual tastes or expertise levels of the consumers are nor the environment (temperature, humidity, etc.) in which the wine will be made. EC1118 is just a safe bet for them. If, as the winemaker, you want to try another yeast, knock yourself out. Personally, I follow the instructions and use what comes with the kit. After all, I am not making 90+ point wines here and a wine like Gewurtztraminer is one we drink at lunchtime or in the afternoons with a little bread and cheese. I have a triple batch of the California Symphony on right now which will be drinkable early next year and likely be gone by a year from now. All glory is fleeting.