We definitely want this to happen 
so thanks for all the good feedback!
In theory, all parameters should be supported, Speckle doesn’t differentiate between built-in, shared or project parameters.
If they are instance parameters you can read them and write to them (sending and receiving), if they are type parameters you can only read them (as writing would require editing the family).
For shared and built-in parameters, we need to use their GUIDs/Built-In-Names as their display names are not unique and because they could be in other languages.
If you can’t find some parameters on those doors, I’d be happy to investigate further! Just send me a sample model and I’ll try replicate on my end.
P.S.
I’m looking into ways to improve exactly this Revit-Excel-Revit flow! If you have any ideas on how it would ideally work, it’d be great to hear them!
Also, would a web app with a tabular interface that allows for a bidirectional link with Revit be an alternative solution?