It ain't a question but a feature that could improve the RStudio View pane. Wouldn't be useful to 'inspect' two data structures (data frames, tibbles, lists, etc) on the View pane? Maybe fix one structure and inspect the other at the same time...
Seems like a nice feature request. To get more discussion going around this (and to put it in front of the right eyes), you should post this in: https://github.com/rstudio/rstudio/issues.
Have a look at some of the other Issues that relate to feature requests, that'll help you with writing up the issue.