Yes, I will miss the bucket. On the other hand, it wasn't good for much beyond light landscaping work and a little snow removal. I now have a plow for the F350, and I can "call in" a skidsteer for the big jobs.
You aren't the first to question the mowing time. It is actually 4.2 acres, and I have mowed it in as little as 3.5 hours. That was really beating up the deck, and the second time I attempted to mow it at record speed I had to do some welding.
I have a fair amount of things to mow around, and some of the lawn is a lot rougher than I'd care for. In any case, I wanted to spend less time in the seat and not have to pound the tractor/mower to get the job done in a reasonable amount of time. So far the Deere zero-turn seems to be a home run.