The symlink is safe for production use. Future litespeed upgrades will modify the symlinks to the new version. Just make sure if and when you upgrade in the future, make sure the symlinks are proper in the bin directory as you have manually changed them.
The following messages:
[ERROR] You are not authorized to use this binary, please purchase upgrades.
[ERROR] Failed to start lshttpd!
Is something we are investigating right now. Please stay the course with 2.2.2 and we will fix this in a upadated release. Both 2.2.3 and 2.2.4 are very minor upgrades so should not affect your production stability when running 2.2.2.