1. The object has changed, so you will have to manually change the objects. This is the only way. This will change your object ID as well. You might have to rework some of the mash ups that were built using that object I.
2. That is the new process. It is somewhat different in the June edition but that is the process now.
3. That is sadly true. The processes take a lot of memory in the application/server. If you are using a single node environment, you will have to ramp up your memory and may be the processes.