[golfer]

I don't really see that much overlap if you look at how you might use the lenses instead of the mm of length. The 17x40 is a great wide angle lense. You can use it for those wide angle applacations, especially when the other lenses won't get the full shot you want, ie: landscapes.
The 24x105 is a wonderful walk around lense and will cover many uses when the 70x200 might be to heavy to carry.
The 70x200 can be used indoors and out, works good for portraits through landscapes expecially good when ther is low light.
I am contiunally finding new uses for each of my lenses and places where one will work when the other will not.
IMO you do not really have much overlap. If you had a 17x40 and a 16x32, then you would have overlap.
Best wishes.