Appr has a lot of things that could be better, so I don't see a reason against trying to improve it.
Appr is also has very poor documentation, and is geared toward the experienced players getting better, not the new guys learning.
So, while appr is probably fine for us veterans, something like this with more explanation and a help section is great for those new to the game - and that's what we want - more people new to the game.
why is appr not liked again?
You can't use it on Macs.
I think what we REALLY need is a web-based system, one that runs in any web browser.