Next to TextPlus button I think it's good idea to add a new button called (Custom Object) so we can make many different useful object primitives we always use for good start & easy modeling and save them so we can recall them when ever we want!

Example:
After clicking the (Custom Object) button > drop down list will appears with 10 of pre-modeled Objects that I've already modeled myself and then I can choose whatever I want to make good modeling start with your own style.
Thank you....