You still learn new schemes by grinding, although you will learn fewer than you did at launch. There are more schemes now as each basic scheme has an artisans and masters version. You can also find toolcrafting patterns. The artisans patterns are as common as the basic ones, and can be learned at skill level 60. The masters patterns are rare and can be learned at level 80.
If you are at level 100 skill in toolcrafting, you will not learn new schemes and will have to find the patterns.