NL East Champions.
As always I don't predict playoffs because there's no point. Might as well predict who's getting the most hits today in the game. I can make an educated guess that's barely better than the other guesses.
I think the season will unfold slowly with the Nats going back and forth with someone through Memorial Day, but right when the story shifts to "This is a fight the Nats didn't expect to have" the Nats start pulling away and get some breathing room by the All-Star break. They end up finishing about 5 games ahead of 2nd place whoever (Marlins) but that's closer than it seems.
Of course this is dependent on injuries but everyone's season is dependent on injuries.
What about the recent bench changes? Nothing to note. I didn't hate Frandsen. He was a contact singly guy with the ability to play (but not necessarily play well) multiple positions. He's Lombo, a useful last guy on the bench but anyone can take that role. Uggla over him is probably mostly because Rizzo drafted and loves Uggla but whatever. Last guy on bench is last guy on bench.
Robinson, Reed Johnson, Matt den Decker? Placeholders. There is no real improvement here. Werth should be back in a week so one of these guys gets dropped then. Only question is does one get hot and do the Nats try to unload McLouth in that case to save another couple bucks.
Edit : As I do annually, here's where I let you know I am on twitter. harpergordek. If you are in to such things. Mostly Nats stuff, even though I don't necessarily want it to be, that is how it turns out.