All SQL queries are now managed through ORMLite, which should make them more robust and reliable. In addition, the code no longer has to manage two separate query states for SQLite or MySQL.
Finally 99% of the async functions and callbacks have been removed, instead relying on Cached object data. For example, previously, any updates to the database would wait for a callback function to perform the updates client-side. This is now no longer the case, data updates become instantly available, which should increase the performance beyond what it was originally, in addition to being more stable.