It sounds like you have done what you can at this time until the report comes back on the removed tissue, that give you some idea bout clean margins etc. You can make further decisions then. Even if it is a complete removal, I would still what to have opinions from people outside the surgical world. And don't forget about regular, at minimum every six month, oral screenings by someone that you trust to find these things.

As to what happened in the past, and if that was appropriate, the best that could have been done, etc., that is water under the bridge. You need to understand exactly where things are today, and have a plan to monitor and correct, with people that you trust for years into the future.