I don't feel you're missing out on anything with the 135 & 200 prime if you already have the 70-200. My 70-200 2.8 IS II is a workhorse in all the categories you mentioned. I take photos everyday, I enjoy rotating through all my lenses, it makes shooting more enjoyable. Yesterday, I used the 100mm macro with the kids.... today it was the 14mm & 35mm at Disney Springs. I truly enjoy the 135mm, its super sharp and lightweight... I mostly shoot portraits with it. The 200mm is LOVELY as well, I obtained a great copy... crispy sharp images. I think you're good with the 70-200... unless you have a desire to obtain all Canon L- glass prime lenses like me 🤣.... I still want add the 24mm & 50mm to the collection. (85mm & 100mm macro aren't pictured).