In my opinion, it is worth it if you want to ride twice or if you want to ride it and RnRC. Now that additional FP+ are available after you use your 3 preselected ones, it is possible to get 2 FP+ for TSM but really depends on how crowded the parks are which obviously impacts availability. FWIW, I arrived at HS around 8:15 for a 9am open last Dec. I was at the bus stop at Pop around 8. I was the 11th person in line at the turn style and booked it to TSM. I walked on the ride and then got in line to meet woody n buzz. I could have easily ridden again but silly me didn't know they inflate times. So even tho it said 45 mins, it probably wasn't...live learn for next time.
ETA: lots of crowd predictor sites would suggest avoiding parks with EMH b/c they tend to be the busiest. The caveat to that is if you have hoppers and can move to a less crowded park. But I would suggest only going to an EMH park if you are taking advantage of the extra hours. You could also just get to park open on a non emh day and still get of TSM with little wait. You just need to make sure you're at the front of the pack. I was amazed at the difference 20 mins made with the admission lines. I know Josh at easywdw.com has some pictures of the difference in lines at various times.