Some of the work that I see kicking about now I can fully understand how people get through 2-3 plumbers over a job.
To me if I saw that I would say it's rough, it wouldn't cost anymore possibly cost less to do it nice and neat and correctly.
I took a job on that was started by someone else and she told him to go, when I was there I found out I was the 3rd person there. Yes she was very picky but she knew what she wanted and if she didn't like something she would say, I personally like that as I would rather they say than make do and slag me off behind my back. The standard of work in the property led me to believe that she had no choice to get rid of the others, things like 2 basins, 1 bath and 2 shower cubicles off 1x 1 1/2" pipe, a soil pipe looking a lot like the one in the photo amongst other things.