Hmm, wizatron issue could also be due to how the digit leds work. They obviously should take some time to decay so strobing them doesn't look like a flickering disco. Maybe related to that.
TI-1270: do you have the post-acid pic? I can see the microinstructions, but barely see the output pla and main opcode pla.
Yeah, the change to SETR and removal of RSTR may have something to do with it. I still haven't read enough to understand that change yet. I don't have any working TMS-0970s left, but I have a couple of TMS-0980s, which likely output the same. I could do some logic captures if you think it might help.