Watt had 5? sacks last year. Granted he was double teamed a lot and the Texans were gutted so it should be better. 
That being said, you want to have an, albeit slight, chance to win a SB Arizona, go all in on the pass rush.  The OLs might be the soft underbelly of the very good NFC west. You already have a good pass rush. Wait to see if Clowney gets offers and if he doesn't offer a low salary maybe it works out great. If not Clowney sign/trade for another (Eagles rebuilding, Fletcher Cox?). Use a high pick on a pass rusher or better yet 2 high picks. 
You get by w/ hopefully mild improvement from Murray, seperate yourself from the NFC west and what's left is 2 old QBs facing down a front 7 of good pass rushers. 
The teams that win SBs w/o great QB play, win SBs w/ a pass rush. 
However if they only got him to replace Reddick, that's a more expensive downgrade and lol.