As far as I can tell the critical field, the maximum magnetic field it can withstand before turning into a regular conductor, is relatively low at 0.3 Tesla. In superconductors like YBCO, it's often more than 100 T. If critical field cannot be increased this will limit applications.

Near term may be useful for devices which take advantage of quantum effects such as Superconducting QUantum interference devices or SQUIDs.

Use in microelectronics may be possible, but is likely quite difficult. Making complicated structures out of this material will require radically new microelectronic manufacturing processes. HTSC microelectronics don't exist as far as I can tell.

If critical field can be improved things get interesting. If it can be increased to that of known HTSCs at liquid nitrogen temperatures(critical field scales with temperature), that's interesting because this material should be cheaper.

If it can be increased moderately at room temperature, there is the potential for it replacing rare earth magnets because the material should be cheaper.