First I recommend that you review Cloud Application Integration Design and Implementation Concepts. You'll find that through the emphasis on is Process Designer (web based designer) that Process Developer (Eclipse) can be still used with the Cloud Application Integration service. There are PDD changes that you would need to make for example to invoke a process on an agent from the Cloud (e.g. use of a URN.agentName.process name) but most BPRs should deploy directly or with few modifications.
To get started Sign up for your free Cloud Trial now | Informatica
I would be happy to talk to you about your needs. You can contact me at lclement at informatica.com