For the allo CAR-T product ('personalised' for certain types) I would like them to insert the CAR(s) into the TRAC locus [1], stop rejection [2], use both CD4/CD8 [3] (of the naive plus (stem) central memory phenotype [4-6]), add a cytokine signal [7], screen donors [8], and make sure the cells are polyfunctional [9] for a start.
In addition, make sure the knockouts are designed to try and overcome the TMEs.