There is nothing wrong with base/clear, it's all I use, well 95% of the time. It's much easier to repair, blend, etc... big reason it's used on newer car. Clear protect the paint, uv resistant etc.

The issue with base/clear based on getting it to look factory is, they didn't use base/clear in 1969. I won't even consider doing one in anything but base/clear unless it's a solid color. Not worth the possible hassle if something goes wrong.