SharePoint Migration Tool - First Impressions

I saw this demo'ed at Ignite too and it looked really useful.

Downloaded this afternoon and pointed it at some of our data....

My first impressions were it looked and worked nicely although could have some tweaks (see below)...Then someone pointed out they could no longer see our entire documentation library.......the permissions seemed to have been wiped.

1. It would be nice if we could migrate a subfolder of a share to a subfolder of a document site. For example migrate s:\clients\TestClientA to tenant.sharepoint.com/sharepointlibrary/TestClientA. This way it allows me to run a couple of tests up to make sure it works. Currently I can only migrate the onprem TestClientA up to tenant.sharepoint.com/sharepointlibrary/ so everything is one directory higher than it should be. In my test folder that wasn't a big deal to then select the couple of files in the root of the library and move them into TestClientA

2. Logging as mentioned goes into a random directory. Would be nice to have this linked in the gui somehow.

3. I think I lost access as the permissions on my existing share directory was for InternalDomain\UserGroup1 that does not exist in Office365 (the equivalent would be TeamTechs) (not sure why as I'm not involved in the AzureADConnect side of things) and as this does not exist in Office365 it replaced the existing permissions with a blank set of permissions as opposed to leaving the existing permissions there and still granting my TeamTechs access.

4. No smiley/sad face in the gui to add feedback information and no link to the appropriate uservoice (or other official) feedback locations.

5. I think the default option to migrate Onenote folders as a Onenote Notebook should be enabled and not turned off by default. Is there a reason this is disabled by default?

On the plus side it did migrate my files across nicely and fortunately I still had access to grant permissions back to my TeamTechs group again.