If the Coaches are making an emphasis on catching the ball, that's fine. I'm willing to bet the previous staff also wanted the receivers to catch the ball.
it may very well turn out that the new staff has some different techniques or different motivational ploys that work better with certain players compared to the previous staff. Nothing wrong with trying something new. I tend to believe that it all comes down to talent. give me enough talent, and I can look like a great coach. Give me Troy Williamson, and no amount of motivational methods are going to make him into a receiver.
But, offense works as a unit. to have a good passing game, you need the line to block- you need the WR's to run their routes correctly - at the right depth - you need the QB's to make good reads, and deliver the ball on time to the right location. Do all of that - the result is a completion. If any one of those areas fails, the result is an incompletion or an interception. We'll see this fall if Fleck can get all the pieces to mesh into a coordinated attack.