Coded I think one of the problems with viewing ideas and other non-material things as epiphenomenal (or emergent properties) is that it gives priority to matter in a way that is unjustified and still amounts to reductionism.
-SBF
I'm afraid I don't quite follow what you're objection is here. When I'm talking about emergent properties I mean physical aspects emerging from physical systems. I don't see that as giving priority to matter in an unjustified way.
When I play video games on my X-box it runs extremely complex simulations. But I don't think that my X-box is somehow transcending physical reality. Rather, it's using its physical components to produce an emergent physical system. I feel the same is true of our thoughts and our feelings. They are very much grounded in the physical laws of reality and its material process'.
As the saying goes, the map is not the territory. Rather, it's a representation of the territory. But nobody would say maps are "immaterial". Likewise our thoughts are not the thing we are thinking about (unicorns, space ships, winning lottery tickets). But it doesn't mean thoughts are immaterial.