I've been waiting for the next build (5.0) for a while now and I'm not too pleased with the changes.
First off, the hitbox is different in this release, which makes it impossible to use routes available in previous releases. I find this particularly egregious, as now two feet of empty space with a 2 inch drainpipe next to it is impassable. If it looks like you can walk through, you should be able to walk through it, especially in a stealth game where running away matters.
The way more important issue is the games tone and atmosphere. Before, the game had a spooky and creepy tone. This meshed perfectly with the concept of exhibitionism - reinforcing to the player a sense of "hey, don't get caught" and "what you're doing is wrong."
This update threw that out, and it's not at all for the better. The levels are so bright that you wouldn't think it's nighttime. Rika's new cell shading makes the game feel arcade-y. By removing the more realistic elements of the visuals, the player is further detached from the game. The tone is completely out-of-whack and it greatly diminishes the player experience. How are you supposed to be stealthy when your character practically glows?
The cell-shading also turns Rika's vagina into a black bar from essentially every angle except dead on. For an erotic game it's not a good look.
I would go back and replay the 4.2 alpha in order to see just how much better the experience is. This was a step backwards and I hope you reconsider the changes in future versions.