Most pex manufacturers have a pex to copper stubout. You may have ended it earlier than optimum. Depending on what you are using, you may use pex compatible shutoffs, but many prefer to make that connection to copper.
Eventually (or maybe now), those short stubs of galvanized will clog up and give your grief. If the flow to the items are okay, you can probably wait, but it is the weak point in the system. You had an opportunity to look at the insides of the piping when you removed it, so you have a better idea than anyone here.