The fly half is now back to full fitness and has justified his move to Warriors with a number of eye-catching displays including his first try against Harlequins and all-round game management against London Irish.
Ruddock insists Jones can get even better and claims his No.10 will grow in stature at the club as his confidence continues to soar.
"I thought Matt was very good against London Irish in the EDF Energy Cup and made very good decisions under pressure, when to run and when to kick," said Ruddock.
"The mix in his game was really good and I told him that at half-time, he put some long punts in and turned the opposition and at times he passed the ball very well from the set piece or ruck. His grubber kicks were also keeping them on the toes. There was a lot of good game management by him and decision making.
"He is starting to grow in confidence. I can see a change in his body language where he is starting to look like the Matt Jones I remember from a few years ago and that can only be good news for Warriors."