PS CC 2019 Crop Tool Changes, Guide/Snapping Issues, Keyboard Shortcut Options

I have several issues with PS CC 2019:

1) Clicking outside of the boundary of a crop preview now instantly confirms/executes the crop. What? How am I supposed to drag a guide from the ruler over to my crop boundary? After some trial and error, I find that for some arbitrary reason, I now need to hold Control to do this. Okay, maybe I could get used to that, but this leads me to a much bigger problem:

2) Guides no longer snap to the crop boundary. I have every Snap option enabled under the View menu. No problem, let me just check the dimensions of my image, open a calculator, and do some ratio math to figure out at what position I need to make the guide then! I love doing math instead of just dragging a guide that snaps in a half-second.

3) I know people have already complained about this elsewhere, but what is the rationale behind changing scaling to be proportional by default? Great, I can revert the behavior by Googling the issue and manually creating a config file. I didn't know I was working with GIMP on Linux! I was under the impression this was the best image editing software in the world for professionals who don't have time for this stuff. At least provide an option to revert in Preferences.

4) The undo shortcut change. Repeatedly hitting Ctrl-Z is easier for evaluation while toggling a change back and forth than flipping between Alt-Ctrl-Z and Shift-Ctrl-Z. I need to be focusing closely on the image to evaluate changes, not thinking about switching keys every half-second. It makes sense that Alt steps back and Shift steps forward, because Alt is subtract and Shift is add everywhere else in PS. Luckily this is actually something one can revert in preferences, unlike the other new changes.

5) I have an action that places a watermark with transparency in the corner of my image, inset with about 5 pixels of padding. Since the update, the watermark gets truncated anytime the opacity of any layer is changed, until I toggle the watermark layer off and back on. It's not exceeding the bounds of the image, it's the topmost layer, it's in Normal blend mode, and it worked fine before. It's not a rendering issue, the truncation shows up in an exported file.