Team has holes. It won't get back on top until those holes are filled. Those holes need to be filled before everything falls apart. There's about 5 years max before Carter/Quick join Brown/Stoll/Williams. Bottoming out next year when the team clearly isn't competing for a cup goes a long way to filling one of those holes.
As far as what's changed since last year:
EFFECTIVE top 6 winger. Lucic was effective with any line combo he was put with. He will be replaced by Brown/Purcell this year. We'll see how that goes.
Lecavalier is replaced by Shore/Dowd/Lewis. Don't know how many notice, but when there are 3 lines capable of producing the team plays a lot better. It puts a lot of pressure defensively on the opponents and doesn't allow crap teams to shelter guys on the 3rd pair. The 3rd line is looking like some combo of Brown, Purcell, King, Lewis, Dowd, Shore, or whoever else is in Sutter's doghouse at the time.
2 players have moved off the offense. 3rd line looks like it will struggle to put up points and can Brown/Purcell be as effective as Lucic in the top 6. It's not a big change, but it doesn't take a lot to get the team out of high gear. Only having 1 or 2 lines that can put the puck in the net with the Kings style of play is going to put a lot of pressure on the Kings defense. Which has names like Greene, Scuderi, Gilbert, Forbort on it for next year.
Clifford: There's no real reason to move him now. As the Kings aren't going for a cup this year and don't need to max out the salary cap, who cares about him making 1.6M.
The Kings weren't good enough last year, got worse, and other teams in the division improved.