**Update**
OK, so I swapped out the 11-28T for an 11-32T on the Swift. Riding on the flats seems fairly normal (more on this in a bit). I haven't hit any big hills on it yet, but even on an easy hill I felt a major difference between a low end of 32" vs 36." And yet, questions remain...

I've done a few more calculations to try and figure out how the cassette switch will impact my riding. I noticed that about half of the rings have the same teeth, it's gears 1, 2, 5 and 6 that change.

On average, changing from one gear to the next on the Swift with an 11-28T, at a cadence of 80 (just picked as a sample) is 1.95mph. With the 11-32T, the average is 2.11mph. On a road bike with a compact double, it's closer to 1.6mph.

So just out of curiosity, how is this going to affect my "cruising speed," if at all?