Signed up also to vote for this issue. Ever since world depth was increased from 0 to -63 have been having problems. In addition to freezing etc. Blocks sometimes not rendered allowing a see through view to other structures in the world and sky colour (blue or black). Rendering can take up to a minute. Currently in old mineshaft which is unplayable as blocks take at least ten seconds to vanish allowing plenty of time for cave spiders to bite me!
That will be great! Thanks
Edit. Tested now and it runs great. Still a few minor pauses when opening the inventory but a vast improvement and once again very playable. Please pass thanks on to developers who fixed this.