Donald Glover has talked about the change of director on Solo: A Star Wars Story, and the experience of moving from Philip Lord and Christopher Miller to Ron Howard.
The directorial change for the film came due to Miller and Lord's improv style not quite working in a studio system, causing a lot of on-set trouble. That ended with the duo leaving the project and Howard being brought on as a stable hand to guide the production to completion. Glover, who is playing a younger version of Lando Calrissian in the film, has spoken about the transition to Deadline, and it seems Howard's primary concern was making sure the actors and their visions were kept intact. Speaking at TCA about how the change affected him, he said:
It didn't really. I think we were never faced with anything like that and he did a good job of coming in and didn't want us to change what we were doing at all. He wanted us to be comfortable with our vision.
Some speculated that there might have been extensive reshoots on the film to bring it in line with Howard's wishes, however, Glover seemingly shot that down. When asked how many reshoots were done, he said simply:
Not a ton.
It sounds like the transition, at least from Glover's point of view was pretty easy. Howard is an experienced director, so it isn't surprising he came in and levelled the boat without rocking it too much in another direction. Hopefully, for the movie's sake, the transition of directors won't be noticeable at all.