The wall outlets look fine as long as the 568a standard is followed. I’ve heard of builders pulling CAT5e and using it for phone. Definitely acceptable. Its just that when that wire is repurposed for data that the ends may need to be redone because what is in the panel where all the wiring comes together is not going to work for data. Since it’s not your place you can buy a few inexpensive keystone’s and crimp down the lines in that box to 568a standard then put an inexpensive switch in there. If you owned the place or if the owner wants to pay for parts you could go farther and properly wire up a networking patch panel. Either way just having the correct wire type in place puts you so far ahead in terms of the amount of work you now don’t have to do. Have fun!