as Dutch says its better. I use a detachable ridgeline when Im loungin around doing chores, it makes for a chair feel. I have mod #2 which Dutch describes. I was growing tired of getting in and out of my ULBP and the zipper mod was a godsend for Hennesey Hammocks, truly a better hammock now.
To answer your question directly....No it does not affect the chair ability nor the structural integrity of the hammock imo.