I lace all of my leather saddles because I prefer the narrower skirt and like the additional firmness that this provides. I do it on older saddles to help them to regain some of their original strength. I've not found that this adversely affects the comfort. To my feel, the shape is improved. But as is often said here...saddles are a personal thing.

To the OP, no need to fear the laces. You can remove them and try it out. You can replace them and try it again. You'll find what works best for you.