I personally don't believe any Texas court would hold that the CHL eligibility criteria, and the minimal fee requirement for issuance in order to practice habitual carry of a handgun is a transgression upon the RTKBA . The renewal class requirement will end Sept 1st, and veteran renewal fee reduced to $ 25.
Looking at that open carry case pending in the State of Mississippi v Robert Schuler, et al - the same arguments made in the amicus brief submitted by Florida Carry and others seems to dovetail well with the Texas situation-since Article 1 Section 23 secures a "RIGHT" that SHALL BE HELD by every citizen in Texas- not a mere state granted privilege.