I wouldn't change too much. Just the two hours required like now (simulated IMC to learn the 180 on instrument) followed by or combined with a requirement to spend at least 15 minutes in actual IMC ie. cloud. To show that simulated IMC is NOT the same as actual IMC.
If during your 45 hours PPL you cannot find actual cloud (it happens), you are limited to very good viz conditions until you've done the 15 minutes actual cloud time with an instructor.
Just to prevent people from thinking that with the very limited training they've had, they can enter cloud safely.
My first time in actual cloud, two years and something like 60 hours since my PPL skills test, was a serious wake-up call for me. (Had an instructor with me though.)