I claim no expertise in adjusting plans, but I think I’ve seen similar questions to this answered here before. The overall question is what plan(s) to use when you have an objective that is big (requires good fitness) and is technical, but not very technical. The thought process runs something like this:
How does the technical difficulty compare to what you can do “off the couch?” If you can climb 5.10 off the couch, your objective is 5.5, so you really wouldn’t need to train climbing, just mountaineering fitness. If you are also hiring a guide then rest of the technical issues are taken care of. Just do the 16 week plan to the best of your ability and have fun.
If 5.5 off the couch is not so easy, or you are doing this unguided with a partner, then getting in the technical time in the train up is important. You might want to do the Alpine Climbing plans instead. Or you might want to stack an 8 week rock climbing plan on top of the 16 week plan (I’ve seen that mentioned here before). Or you might want to adjust the plan so you have a period of intensive climbing in a relevant environment (the “graduation road trip” in the “Training for the New Alpinism” book). If you were close to the mountains you might adjust the plan so instead of doing a 4 hour run you are doing an all day climb with your partner that includes at least 4 hours in zone 1-2, preferably on scrambly rock terrain. If that isn’t possible, because you are in the wrong place or no way you can devote that much time, maybe that’s a signal the planned approach to the objective isn’t the best. People who do big routes that are also technically challenging (challenging for them, whatever the grade) and do them self-supported put a lot of time into preparation, no two ways about it.