'final beta' isn't 'final' also, somehow I don't trust that this doesn't mean a crap ton of patches.
I am actually glad they are doing this because maybe when the real game drops there won't be a ton of patches THEN. also, it may be that they completely hide or package all the script files then. so if that happens then likely there won't be a trainer either.
No need for a trainer. There is a testing tool available that also functions as a trainer (e.g. god mode, super speed, unlimited building etc.). It is available from the kleien entertainment forum. Essentially, it is a mod that gives special cheat options for modders.