Winning 31 games instead of 30 is actually a better winning percentage than winning 82 instead of 81, but neither feels especially impressive.
But I wouldn't pronounce making the playoffs hollow until they actually played the series, and even then, I don't see the downside to giving these players their first postseason games, even if they get rocked. Look at 2007. That team seemed special but it turned out the Mets were just really bad and Colorado was even hotter than we were. But it was still a learning experience. And it would be even more of one this season when we haven't seen any other NL teams.
Even with a lesser pitcher on the mound you can win any game on any given day, even against the Dodgers. If memory serves we played them all right last year, and some of our best play this year has been against the best teams (Atlanta, NY, Toronto). Maybe that will continue this weekend.