I agree the indexing delay is a issue that needs to be resolved, but I think it is also important that ACOM has their site stable before they do reindex.
re: "This also means that no one will be able to see your new tree." Anyone you invite to your tree can find it ok, and all your data in the new tree is there.
With all the changes to ACOM and FTM, the sync issues seem to have mostly resolved. Hopefully ACOM will be able to reindex soon. When they do, there may be disruptions to service as the servers will likely be very busy for a while....