World Partition is full with bugs! Why deprecating World Composition at this stage?

One of the things that i experienced with world partition is that, when i used the foliage tool to spawn some foliage it miraculously did not allow me to spawn the folliage in ONE QUARTER of the landscape … the other time it was spawning in 3 QUARTERS but not in the LAST QUARTER … when i added a z-offset for the folliage brushes the foliage did begin spawn but half the trees were burried in the ground with only the top part visible above the landscape !! Also most of the times the trees were spawning in a very small part of the land that too… not a grid cell or something obvious it was just random. It was more like a random small circular or linear area on the lanscape on which folliage spawned but all other places it wasn’t.

Wasted a lot of time trying to figure out the bug !! then i made a level without world partition and everything was working fine…

If anyone has found the solution to cure this bug please tell

Thanks