I'll take this backwards first. Who I received training by has no bearing as to whether or not I agree with Fritz's serving philosophy. That's like saying since Bob Stoops coached with LHC Bill Snyder he should stand up his tight end. If I coached high level college volleyball I think I would serve aggressively for the simple reason that since sideout scoring was eliminated a point is scored on every serve. If you allow high level teams to essentially receive a free ball you will get killed. I'm not sure why you see this is an issue, no matter what your serving philosophy is you're going to have serving errors, part of the game. I could understand the angst if her team's were near the bottom of the league in serving, fact is traditionally her team's have been near the top of the league in serving. Look it up, you'll see, maybe if you find it for yourself you will have an easier time accepting this and drop this gripe.
Now as to the body of what you're talking about, you kind of answered your own question. If they aren't passing they aren't hitting. Also everyone defends with two in the back. You may have one rotation where you can play three back. Now did Fritz or Grove see something in the video to let them know that the tip was there at certain times, maybe, sure, I guess. However, if they did you as a player have to execute. Whether the defense knows its coming or not a well executed tip, like a bunt in baseball, is impossible to defend. This is the same with finding the right spots when you swing. You as a hitter need to find the places to hit but you can't tip the swing with your shoulders too early. I have no idea what happened last night, I'd need to see the coaches film to see what went wrong, although it is pretty easy watching the broadcast to delineate that KU is better than I'd this year. In summary to this point, you cannot blame Fritz for her game plan, it just doesn't work in volleyball. Game planning is a really small part of developing a great team, your system is much more important. If you're going to freak out with every loss you should be effusive with every win. It's not like football where the preparation and lead up can win or lose you a game if the team's are equal. College volleyball coaches are hired to get the best players to run their system, not gameplan.
The blocking is similar. It isn't a matter of "what's wrong with the blocking" its what happened with that block. We are a good blocking team, 3rd in the conference since conference play started. If they had a bad night again I'd have to see why this block was slow, or why that block floated. We don't have a problem with blocking though, the numbers bear that out. Sometimes you have a bad night.