As Peter said, Adobe Tracker is the best way to file in bug reports, feature requests, and enhancement suggestions etc. (one ticket per issue, please). This way it goes directly into the ticket system the developers are using and they can discuss them and plan them out. Also, as Peter said, other users can vote and help prioritizing.
For direct support, tcssup@adobe.com is the right address.
For more general feedback (like perhaps on RoboHelp's user documentation), techcomm@adobe.com is the best place to go.
That said, it's totally fine, to put such ideas here as well, and discuss them with other users, best even before creating a ticket. An active discussion among the users also helps Adobe to understand an issue and it's relevance for the broader user community and it's impact on the user base better. Something along the lines of "Hey peers, I have this idea and consider to create a ticket for it. What do you think about this idea? Any comments? Something I might need to add?" is a good start.
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