Plumbing Setup for Basement Laundry

I am trying to remove some outdated, and possibly poorly laid out plumbing to create a new setup for a washer/dryer and sink. The current setup has a brass drain line a few feet above the ground and both the sink and washer feed an ejector pump that pushes up to the drain line. I am thinking about scraping the existing brass up to the T that goes to the pump and then relocating the laundry to the right wall using PVC. I have included a photo of the existing setup plus a really rough drawing of what I was thinking. I was hoping someone could let me know if I have any major design flaws in my drawing. Thanks in advance for the help and I look forward to both the good and bad feedback!