  MIRC-X and MYSTIC are six-telescope near-infrared beam (1.08-2.38 ${\mu}$m)
combiners at the CHARA Array on Mt Wilson CA, USA. Ever since the commissioning
of MIRC-X (J and H bands) in 2018 and MYSTIC (K bands) in 2021, they have been
the most popular and over-subscribed instruments at the array. Observers have
been able to image stellar objects with sensitivity down to 8.1 mag in H and
7.8 mag in K-band under the very best conditions. In 2022 MYSTIC was upgraded
with a new ABCD mode using the VLTI/GRAVITY 4-beam integrated optics chip, with
the goal of improving the sensitivity and calibration. The ABCD mode has been
used to observe more than 20 T Tauri stars; however, the data pipeline is still
being developed. Alongside software upgrades, we detail planned upgrades to
both instruments in this paper. The main upgrades are: 1) Adding a motorized
filter wheel to MIRC-X along with new high spectral resolution modes 2)
Updating MIRC-X optics to allow for simultaneous 6T J+H observations 3)
Removing the warm window between the spectrograph and the warm optics in MYSTIC
4) Adding a 6T ABCD mode to MIRC-X in collaboration with CHARA/SPICA 5)
Updating the MIRC-X CRED-ONE camera funded by Prof. Kraus from U. Exeter 6)
Carrying out science verification of the MIRC-X polarization mode 7) Developing
new software for ABCD-mode data reduction and more efficient calibration
routines. We expect these upgrades to not only improve the observing
experience, but also increase the sensitivity by 0.4 mag in J+H-bands, and 1
mag in K-band.
