From my point of view and how yoyo has evolved over the past year for me. Long story so heat up some popcorn, grab a drink, get comfy and read on 
I threw as a kid during the boom (even popularizing yoyos at my school) but at the time, my tricks were basic beginner tricks (Walk the Dog, Rock the Baby, Eiffel Tower). I couldn’t trapeze so that was kind of my roadblock there. High school comes, I put the yoyos away for a long time.
Back in 2010 my parents bought me a Duncan Imperial as a gag birthday gift so I tried my hand at some of the stuff I learned. I then wanted to look around and see what yoyos were available at that time and had bought a $5 Mosquito at Walmart. That’s when I found YYE and saw how much yoyoing had evolved from the basic picture tricks and trapeze/double or nothing. Eventually I got myself a few better yoyos to learn on and learned how to bind quick when my Duncan pads wore out. Finally I had a few decent metals in my collection (Maverick, and had snagged a Rec Rev No. 9) which took me a good distance.
During this period (2010-2012) I pretty much stuck with YYE for the tricks and thought this was what there was to learn. I had attended a couple Bay Area Classic contests during the time and wondered how people did these other cool tricks as I couldn’t find them anywhere.
I took another breather in 2012 as my best trick was Kwijibo at the time, and I had no more drive to keep furthering myself - had no other fellow throwers that I talked to that could “rival” me and for me to help.
2015 BAC - I pick back up on yoyoing and met a few people in which one I keep in touch with all the time. We both got into looking up “how yoyo tricks are made” and realized there’s a ton of tricks out there. YYE’s tutorials is a solid foundation to get you going and to get you ready for some of the other tricks out there. I realized there’s more crazy elements to learn or discover. Trick creation is kind of one of those things where you want to take an existing trick and try to mess up, and try to do something different. Linking things together is one of those things that will click. You’ll realize that one certain element can branch off many different ways, possibly leading you to another element you might already know.
TL:DR - I hit this same thing, not knowing where to go. I found other tutorials (CLYW cabin tutorials, Rethink yoyo, and Mrmattio to name a few) that introduced me to new things I’ve never seen. I began messing with some of what I learned (even if I didn’t learn the entire trick) and went from there…and new trick is born.