Not to say that the contract wasn't an overpay, but I think some are underselling Holik by calling him a 3rd line forward. The late 90's / early 00's Devils were deep and could roll four lines fairly evenly. Just going by ice time:
1998-99: Holik (17:34), Arnott (15:24), Pederson (15:19), Carpenter (15:17), Morrison (13:55)
1999-00: Arnott (17:05), Holik (16:53), Gomez (16:21), Morrison (16:09), Madden (11:40) -- Gomez spent most of the season on LW before shifting to center after the Morrison trade
2000-01: Arnott (16:12), Holik (15:49), Gomez (15:46), Madden (15:35)
2001-02: Holik (17:42), Arnott (17:13), Gomez (16:46), Nieuwendyk (16:22), Madden (15:36) -- Gomez spent the second half of the season on Holik's wing
Not saying he was a #1 center by any traditional means, but perhaps just more of a 2nd line guy who you could match up against an opposing #1 center and provide some secondary offense. Since Holik was usually a 55-60% faceoff guy, you could use him on the top unit to win an offensive zone draw and be a net front presence. The Devils quietly had the #3 and #1 PP in 1999-00 and 2000-01 with Holik on the top unit.
Like most Devils fans, I wanted to retain Holik but when it was rumored that he'd be getting 8+ mil on the open market that was a bit too much.