Ok, after hobbling through my DH yesterday after dropping my gear bag on my foot heading out to it, and a late-night trip to urgent care, here's my thoughts on some of the stuff brought up...
1. HBP: this has been an active issue that the NCAA has been trying to clean up. The rule changed a few years ago from awarding the batter first as long as the pitch was in the box and he did not intentionally move to get hit (there was no requirement to move out of the way.) When the rule changed, there was still some grey area when it came to pitches where the batter didn't move. Now, as a point of emphasis, we are to keep the batter at home when he permits the pitch to hit him. That's the biggest reason you're seeing that increase.
2. Strike zone: I think we are at the point where we (as a baseball culture) are going to be torn between what is "expected" and "consistency" vs. expanding the called zone upward and tighter over the plate. I had an absolutely too-small zone my second plate of the year, both up and down, but it was consistent and got very few complaints. I was not happy with that, as it was going against what we are being told to call this year. My third plate, I was getting the high strike, but not the low one, and it frustrated everyone (to include myself) because it put pitchers at a disadvantage (although not noticeably so during that game.)
This brings us to the issue I was hoping that the folks here would bring up, and you didn't disappoint--mostly what should be called high or outside. We are getting a lot of pressure to clean up the outside strike and bring it in--that's never been a problem for me, as I do a lot of wood-bat in the summer, but apparently there is a sizable portion of umpires who are still giving too much outside. The problem often lies in that outside pitches look good to everyone else in the stadium except for the catcher, and he's not going to complain if he gets that call. Thus, there's an immediate expectation on an outside pitch that it would be called a strike. When I don't give that pitch, I do hear it for a couple of innings.
The high strike is a beast all its own, and I think it's because it's the least-defined boundary of the zone, as well as the one that is most impacted by breaking balls. Everyone has an idea of where the top of the zone should be, but a batter in a stance makes it a bit difficult to delineate exactly where that line is. If we aren't getting a strike above the belt, we aren't doing our jobs...but a lot of strikes above the belt also cross just below the letters as the batter leans forward, so it looks higher than it is. If we want to get that strike consistently from batter to batter, game to game, and season to season, everyone is going to need to understand that is what the high strike looks like from either dugout, and expect some pain as it is called more and more. The amount of pain is going to be regionally-dependent, too, as over time, each conference has developed their informal expectations through socialization (i.e. what the participants are willing to accept as a zone vs. what umpires are instructed to call, and so on and so on over time.) I think that right there is the biggest reason why there are different ideas on what a strike should be based on whether you're a fan, coach, pitcher, batter, etc. and where you are.