Could you please let us know which build(s) you compared with 2080.
We could not identifiy what changes which could cause the performance issues you noted in build 2080. The major changes in build 2080 is to fix View Difference issues you reported earlier. Those changes are isolated in the View Difference area and it should not affect other areas in the product.
We would suggest that you can try the new build 2086 and see how it performs. Again please provide us the SQL Tracker log if you still have same issues in build 2086.
Thanks and regards,