Smart idea, trust me I tried to wait myself but once I realized that the 7700k will still have more powerful single threaded performance which is really important for all gaming, I have no regrets as performance is through the roof, always over 100+ FPS and for some reason I only like really demanding games (not on purpose just the way it works out for me).
A 1070 system like mine with a really good CPU could probably out game some 1080 systems that made the wrong CPU choice, that's why everyone is pushing the i7, at the high end it really matters. Saving some $ on CPU but having your GPU perform $200 less fast is what needs to be feared and avoided.
Going back to your list, only BF1 and TC:TD are demanding. BF1 does benefit from i7 vs i5 but Division is more GPU than CPU bound. Division had the least improvement from the 1070 on old CPU to 1070 on new CPU (still 20fps more all the time and no dips at all on new system, old system would dip into the 50's 40's FPS in certain areas).