Add in the time to transit from hotel to train station, arriving a little early to find your track, arriving in the new location, getting oriented, waiting for the next boat , etc, and it does become a long day, not to mention nutrition stops.
My own personal opinion is that the mountains never get old. If there's a summit, and the weather is clear, I go for it. I never get tired of the summits, as each has their own personality. And the mountain weather is so fickle, you can't just assume you have all the next week for mountain scenery. It could rain or become foggy. If there's weather is good today , go for it.
Have a great time!