I just spoke with Oracle Support and from what I have heard, we will no longer have phone support for Eloqua. This means that you need to open a case online and wait for it to be assigned for it to be worked on. For things like autosynchs, failures and other issues, this will greatly slow down the responsiveness of Eloqua support. This was a huge competitive advantage for Eloqua. Feeling a nervous about the new process and being able to resolve issues quickly.
The other issue is that email notifications about cases no longer contain the case comments (you need to log in) and replying to the email doesn't append comments to the case. Both things that will slow down the process of working on cases and make things more difficult. This is functionality that should be restored. I would think that going to a bigger company we would have more functionality/ease of use, not less.