The article says that RNA encapsulation is the big bottleneck. This is a touchy microfluidic process. That needs to be accelerated. While few companies make those parts, more could. They're made by a process similar to that used in a wafer fab. A low-rez wafer fab, like the ones used to make MEMS gyros and such.

Part of the problem may be that wafer fab people and drug production people don't talk to each other much. Someone should get them talking. Might come to nothing. Might lead to "oh, we can make that easily".