This is a complete misunderstanding of the situation.
This change has unblocked tremendous amounts of velocity for the team. Changes that in the past would take us many hours to work through can now take us minutes.
Take adding /filter support for assign and solved. Something I did last week. Yes, it was possible in the past but it required cross repo coordination which was very complicated to pull off, now we can do this stuff easily in 1 commit.
The end result is that the quality/stability and velocity of improvements for core plugins increases. It also gives us a better extensibility story overall cause we are less reticent to improve our extensibility story.