While working on a project with a friend, we stumbled upon a grammatical problem.
These use cases have been modeled and help convey the game’s primary gameplay.
I'm uncertain whether or not it's acceptable to switch between past tense "have been" to current tense "help."
I'm wondering if the following, would be better suited:
These use-cases have been modeled and have helped convey the game’s primary gameplay.
My friend argues that the alternative I proposed doesn't clarify that the use-cases still convey the game's primary gameplay to this date.
Are both correct, or is one preferred over the other?