If you wanna go down the road of "Wouldn't it have been better if they just put out that one album and left it on that high note?" logic you could easily dismiss the entire discographies of multiple bands. Whether it's Steel Panther, AC/DC, Iron Maiden, Foo Fighters or whoever else doing their thing, making their music within their "sound" for years, you could always argue that they could or should have stopped but many of the fans would disagree. Personally I'm not a huge fan of Steel Panther or anything - they're a fun guilty pleasure kind of band but IMO their funniest songs aren't on the debut.