For comparison, the #30 picks since the Preds entered the league:
1998 - D - Kyle Rossiter - 11 games, 1 point. Next impact player: #44 - Mike Fisher
1999 - D - Luke Sellers - 1 game, 0 points. Next impact player: #44 - Jordan Leopold
2000 - C - Jeff Taffe - 180 games, 86 points. Next impact player: #33 - Jeff Schultz
2001 - C - Dave Steckel - 425 games, 79 points. Next impact player: #32 - Derek Roy
2002 - C - Jim Slater - 584 games, 138 games. Next impact player: #36 - Jarret Stoll
2003 - D - Shawn Belle - 20 games, 1 point. Next impact player: #33 - Loui Eriksson
2004 - D - Andy Rogers - 0 games, 0 points. Next impact player: #32 - Dave Bolland
2005 - D - Vladimir Mihalik - 15 games, 3 points. Next impact player: #33 - James Neal
2006 - D - Matt Corrente - 34 games, 6 points. Next impact player: #36 - Jamie McGinn
2007 - D - Nick Ross - o games, 0 points. Next impact player: #43 - P.K. Subban
2008 - G - Tom McCollum - 3 games, 1 win. Next impact player: #32 - Slava Voynov
2009 - D - Simon Despres - 193 games, 43 points. Next impact player: #33 - Ryan O'Reilly
2010 - C - Brock Nelson - 433 games, 211 points. Next impact player: #37 - Justin Faulk
2011 - C - Rickard Rakell - 343 games, 218 points. Next impact player: #34 - Scott Mayfield
2012 - L - Tanner Pearson - 346 games, 151 points. Next impact player: #36 - Pontus Aberg?
2013 - R - Ryan Hartman - 200 games, 76 points. Next impact player: #34 - Jacob De La Rose
2014 - C - John Quenneville - 26 games, 4 points. Next impact player: #33 - Ivan Barbashev
2015 - R - Nick Merkley - 1 game, 0 points. Next impact player: #32 - Christian Fischer
2016 - C - Sam Steel - 13 games, 3 points. Next impact player: #39 - Alex DeBrincat
2017 - R - Eeli Tolvanen - 7 games, 2 points. Next impact player: #41 - Jaret Anderson-Dolan (this was who I wanted the Preds to take)
2018 - D - Alexander Alexeyev - 0 games, 0 points. Next impact player: none
So the #30 pick is basically a tossup. It seems like wingers have been a more successful pick there and that Tolvanen seems to be on a path to be one of the better picks if he carves out a career as a middle-six scorer.