Not really just that, there are a lot of other things:
1) The promise of the levelling sensor (which I haven't gotten to try before)
2) Extended battery life
3) 14-bit versus 12-bit, it's subtle but it's there
4) Of course with so many seascapes having WR will help, but it's less of a concern since I don't have any WR lenses and there are no WR ultrawides
Other bonuses include the marginally better high ISO and increased DR over the K-r.
I don't really miss the weight or large file sizes though!