Note: For the purposes of this post, I will refer to mmr points and ladder points as just 'ladder points'.
I was thinking about practice and the ladder system and how the two could be made more synchronous.
We know that reaping the rewards of our practice takes time. Typically we see that improvements come after the practice, not immediately, but some time after. It can take a day, a week, or even a month.
What if the ladder system accomodated this curve. Not precisely - that would be impossible - but by a rudimentary mechanic of dealing out ladder points the next day. This way, you would retain your rank and mmr for the day, and be able to practice within a more stable regime. The next day, your ladder points would be awarded/taken, and your new rank and mmr would come into effect.
Making this small alteration in the ladder system will synchronize the rewards of both practice and winning, and could help players become motivated to practice more.