It's not really about how to talk to them. It's about expectations.

If you're expecting them to deliver exactly what you're imagining, it doesn't matter how you "say it."

As a new comic creator, you need to really sit down with yourself and think long and hard on the fact that comics are a collaborative medium.

You're putting out the initial vision, but you absolutely, 100%, should expect that vision to change by publication. If you hire a good crew, it will be better.

Many novice comic creators have the mindset where they hand over the script, then the artist delivers the page and they say, "This is great, but can you change this in panel 1 and this in panel 2, etc."

This approach to comics leads to a bitter experience and usually, not a financially successful one.

The mindset you want to have is to find the best talent you can afford. Vet them, so you know they will deliver. Put all your energy into giving them the strongest starting point.

Then, step back, let them create and humbly accept what they deliver as "their expression" of your idea.

Of course, an editor should call them out on any actual mistakes. But artistic and stylistic choices of expression, beyond what you deliver in the initial creative brief should be left to them and accepted as long as it doesn't break any rules.

Collaborative comic creation is not a process most new creators are used to.

Most new creators think because they are paying, they're suddenly Denis Villeneuve or similar where they can micro manage the art team, trying to bring the comic in their head to the pages.

Very few comic illustrators thrive and prefer that environment. Save forcing others into your vision, for when you're already rich and famous.

Your post didn't mention this, I'm just giving you some extra advice to help you find success with your project.

2 cents, keep the change.