Lack of effort at practice may be about wanting to put in effort or not; OR it could be the players sayin' "you coaches aren't putting us guys in a position to win".
All this 3-3-5 crap is taking away from the fact all this does is substitute a big safety for a defensive tackle (oversimplification I know), it doesn't dictate where you line up. The opponent offensive lineup, their strengths, down, distance, score, etc. should dictate where UConn's 11 defenders are positioned. UConn defenders see that they are out of position and overwhelmed at point of attack per the defensive play calls and what they are told to do. So if you aren't insane why work hard to do exactly the same thing that didn't work and expect it all of a sudden to work? Branch, Butler and Sio aren't walking in the door.
These defensive guys see the delayed blitz doesn't work, zone against 3rd and short doesn't work, 3 man line without 7 in box does not stop run, 3 man rush with zone defense doesn't stop 3rd and long. Then to top it off, let's have the offense hurry up so that we insure the opponent gets as many possessions as possible.
Rule #1 if you are the talent/speed/size/depth loser in a match up is you do everything to "SHORTEN THE GAME". Rule #2 is make sure you refer to rule #1 before you do anything else.
So, hurry up to line all the time if you want to but that doesn't mean you have to hike right away; on defense if opponents are capable of mounting multi down drives on your defense you need to sell out on 3rd down and make opponent beat you deep (and I don't mean 3 man rush and loose zone, make them beat Summers on the deep sideline pass with the QB under pressure, if they can so be it).