if you get rid of the 24-70mm range altogether then i would recommend adding the 35mm F1.4L.
yes the 24-70mm F2.8 is a "boring" lens but i still find it pretty essential throughout the day to cover certain scenarios. a 16-35mm for me would be strictly relegated to dancing shots as the distortion is unacceptable to me for any other scenarios throughout the day. the 35mm @ F2.0 adds a special look to pre-ceremony shots and can be used effectively for bride and groom shots as well. the 70-200mm F2.8 is a special lens in and of itself (regardless of what variation you have).
if i had to strip down my bag to bear minimum i would take the 70-200mm F2.8, and the 35mm F1.4.
my 24-70mm ends up being my security blanket....nothing special about it but very useful and versatile as a main shooter. as a 2nd...the 70-200mm is king.
Yeah, I have been considering the 35mm as well (that would be pretty much an even swap, 24-70 for 35mm). I have also thought about the 24 too, but, while I love primes I think that may be a bit much for weddings... too much lens swapping