The main thing Oracle can improve is the cost. It would be better if Oracle opened up the system to enable integration with other vendors. Whether it's the database, application server, or storage appliance, they should make it easy to integrate them. They need to open up more to ensure that it can work in any environment and IT ecosystem.

Uptime. We had some crashes here and there. The good news is the failover is very quick and most servers do not feel it. For example, a VM server may hang for a minute, but it will recover once it failed over.