Vaibhav, Bartek, fantastic to see you both starting to work on this and super important to have done right in general. We’re happy to be as helpful as we can on our end in fleshing out a framework and would love to collaborate. A few things we don’t see mentioned that might be helpful to consider (albeit some of these are more for general message bridges):
Flexibility of parameters - does the protocol have the ability to change key parameterizations (i.e. block confs from source) and could this be done maliciously / do the applications implementing have any preventative measures against this
Wrapped assets vs native assets - Wrapped assets obviously carry significantly different security assumptions and risk for the user than native assets
Will give it some more thought over the week but appreciate you both taking the lead on this and glad the community will have a consolidated source of information.