(Copied from original User Voice forum)
"From what I understood this feature got removed from the LT version because it uses Python. But creasing is really useful (especially with opensubdiv) when modeling a high poly model for bakes."
"You give us the functionality of creases but in Maya LT we don't have the crease set editor. It's kind of half a tool this way.
Having sets for different types of edges is key to great modelling but with the crease tool as it is pretty difficult to have all of your edges consistent.
You have to drag it and either write down what you had on other edges and hope you don't have to screw with the tool too much to get the right edge thickness.
Please add it into LT."