My kit is also very simple so there is nothing I would change but since I'm running washer fluid and not 100% meth my requirements are different. I don't want more than 50% meth for safety reasons. The quick connects aren't the most robust choice, I think Alky uses all brass AN fittings which I would opt for in a 100% meth scenario. I also don't have a crazy balls to the wall tune so I'm not worried about having some kind of safety if the meth system fails. Sharing the tank is an excellent choice IMO, I can throw ice cubes in there before a race and the run from the pump is like 2 ft so the lines don't see heat soak.
The only issue is using the same nozzles as the alky kit in plastic piping. Overtime they start moving around even though the nozzle is 100% tight in the elbow. I'll have to add a washer.