If you are find the current training load somewhat challenging then there is not need to end the transition period and move on just because you’ve hit 8 weeks. The most important thing to remember about training is that it needs to be individualized to meet each person’s specific needs if you hope to have it be successful. There really is not one size fit all. That is why we went to such lengths in the book and on this website to explain the theories behind training.
We want you to be able to adjust and tweak the training to fit you.
So, if what you are doing now is feeling tough but doable then it is having the exact training effect you desire and there is not reason to change it unless your goals have changed. The point of the transition period it to prepare you for tougher workouts to come. But maybe you don’t need them yet. Are you taking the recovery weeks SUPER easy? Remember that those weeks are not meant to push you to new levels of fitness but to allow you to handle the next weeks of training. So get rested in those recovery weeks.
If rock climbing is something you want to target with your training then it could be a good idea
to switch things up and Steve’s plan is great one. It’ll change the focus of the workouts which might be a good mental and physical break for you.
I hope this helps,