@yoyoyoyo
A 'Remove' option is surely possible, but it is the same as replace with nothing
You can disable all edits by disabling TMS, you can also disable all edits for a certain product by disabling the product.
@giovannicosta
As stated before, I can't reproduce those problems myself - therefore I am somewhat unable to provide a fix

Sorry.
However, feel free to PM me an ACP login and i'll take a look.