This is one of the changes between the "old" Inventor-based IDE and the new ETO Studio IDE. ETO Studio is meant to be a "developer" interface, not a pseudo-end-user interface. Hence we changed the behavior of the new "Parameters" dialog, as compared to the old-IDE "Part Editor" dialog. The new Parameters dialog expects that you, as a developer, will input a formula to specify the value for each parameter ... and hence does not respect the rule-annotations regarding data (non-formula) input.
I.e., this means you have to input strings with double-quotes, and Names with a leading colon.
Personally, I think we (that is, "I") took this a step too far with respect to Name-type parameters. It would have been easy to use the rule-annotations to "suggest" appropriate values, or something like that, and insert it with the leading colon.
Note that rule-annotations don't go away. They're just not quite as useful. ETO Studio respects other annotations, e.g., %%DisplayName for the Model Browser window and %%Category, etc., for the Model Properties window.
As much as I want people to use ETO Studio, I will point out that the old IDE is still available, just disabled by default.
Jon Balgley Autodesk Configurator 360 / Inventor ETO team Autodesk, Inc.