This is great news for the Rams Offense. While he hasn't developed the consistency, Quick's fast start last season had the majority of us (to the tune of 86%) thinking he could produce at the level of a #1 WR for the entirety of the 2014 season.
With the Rams Offense struggling mightily this preseason, adding Quick - even if only to get his feet wet or take that first hit - is a good thing. He bumps everyone not named Kenny Britt down a notch on the depth chart and brings another big body for Nick Foles to look for. Luckily, Quick has been active (in a non-contact role) in practice and has likely started developing some chemistry with Foles. Getting some game snaps in before the start of the season is going to be very valuable.
The biggest question mark for anyone coming off of an injury this serious is if they will be the player they once were. Quick has shown he has the ability to flourish in the NFL - when healthy. If he is healthy and has confidence in his shoulder, he should be able to produce like he did at the start of the 2014 season - and this offense will be trending up.
Now if you add a healthy Todd Gurley AND Quick to this offense.....well that's a whole 'nother beast altogether.