The only part I object to what you wrote is * emotions shouldn't interfere with cognition*.

This is an ideal which Objectivists believe in, but it is difficult/impossible to actually achieve. I've noticed that as I've gotten older, emotions interfere with my cognition less and less and I am happy about that. You can define cognition how you wish, but given the number of people who see it as separate from emotion it's probably worth having a backup definition in case you want to talk to those people.

RE: emotions, affect, moods. I do think that emotions should be considered when making rational decisions, but they are not the tools by which we come to decisions, here's an example.

If you want to build a house to shelter your family, your emotional connection to your family is not a tool you will use to build the house. It's important to have a strong motivation to do something, but that motivation is not a tool. You'll still need hammers, drills, etc to build the house.

I believe we can and should use drugs (I include naturally occurring hormones) to modify our emotions in order to better achieve our goals.