Been there, done that. I think it will do fine, maybe bushier. which won't hurt.
Vikki

I agree with Vikki, it will be fine.

Carol

Your phlox will definitely bounce back. My phlox gets a free pruning every year courtesy of the deer. After the initial haircut they seem to go easier on it, and I always get a full season of blooms.

Thank you so much for your prompt and encouraging responses.

I hope I'm not pushing my luck by prepping and sticking those pruned tops in hopes some may strike roots :-)

Diane