Most/a lot of workouts in the plans have the +/- variants available as @IvyAudrain mentioned which is pretty handy for tweaking the plans to fit your schedule better when it comes to time available on a given day (when this gets built into Plan Builder it will significantly increase the functionality of it!).
As an example just yesterday of going the “-” route, I wanted to follow the cycling portion of the Full Distance Tri Base LV plan as a 12-week lead-up to Christmas/the end of the year, but I wanted to stick to just 1-hour workouts for during the week and I was able to add the shorter variants in for almost all of the workouts–it would work just as well going the other way in most cases too. It was quicker for me to just have the plan up on one screen and my calendar up on the other and add each workout in since I was needing to load quite a few of the shorter versions of the workouts (and I didn’t want the swim/run workouts added), but depending on the plan you may be able to do less manual work. 