Is there a plugin or something that automatically can create a new deposit address on bitfinex and send all change, which normally would go to change addresses, to bitfinex, then withdraws it to a fresh address?
Im asking because i do this manually when i think its needed to keep my privacy. Bitcoin wallet addresses can be connected way to easy otherwise.
In Armory, you can specify a change address. You may need to choose Expert mode, then when you send check the "Use an existing address for change" box and "Specify a change address". Granted, this may mean more manual work than you were envisioning, but it is all built-in.
It's also worth pointing out that Armory chooses inputs in a privacy-conscious way, to preserve as much privacy as possible in a simple wallet scenario.