Can LibreOffice use the improvements to OpenOffice? If so, it seems like the relationship could become quite one sided with LO able to pull in all the fixes to OO and use that to move further ahead, but with OO unable to re-use any of the LO work.
OO uses the Apache License, which would allow LO to pull any change it wants. Of course it doesn't work the other way around, because LO's licenses are more copyleft. So you're right, it could get quite one-sided.
