Adobe are not known for their speed at releasing bug fixes. Given that LR5 was released with quite a number of bugs, despite a beta phase, you can perhaps understand their reluctance to rush out fixes.
Over the last few years I've been working with small teams who have development cycles measured in days rather than months, but I suspect LR is too big (code size and team size) to do that safely. God forbid that they should move to Agile Development methods, which have led to some of the worst and most poorly documented code I've ever had to endure.