Working on a thorough breakdown video of all the features, but until then you can already start using the new and improved version.
One of the main features is Syncing/Externalizing certain tools and configs, meaning they will be retained between different projects! That way you can keep growing your OpTemplates collection and not have to worry about externalizing, all the work is done for you already and is automatic (just need to make sure you middle-click on the OpTemplates icon, or pulse Save Templates).
There are also other new features, such as QuickOp and some OP Menu improvement by the founder of Derivative himself, so make sure to get it and read the wiki!
https://github.com/function-store/FunctionStore_tools/wiki
Anyhow, video is coming soon!
EDIT: Oh yea, very important, ExprHotStrings now has a "secret" shortcut to wrap stuff after #@ in op('...'), so #@noise1.par.amp becomes op('noise1').par.amp, which saves you some nasty keystrokes!