I haven't been following closely, but looking at her SS today, her dose looks too low to me. It looks like she is getting shallow U-curves, which suggests she is responding to the insulin but it's not enough. Yesterday's drop was in the 35% range (maybe a little more depending on when she nadired), and you want about double that generally on PZI.
Although it is possible, today's numbers don't jump out at me as a bounce. She didn't bounce off the 170 yesterday, and though you don't know what happened overnight last night, a 300 PS isn't unusual for her, so it's doesn't strike me as a bounce number. Without more data from last night though, either way is just speculation.
If it were me I would raise. It is nice that some of her numbers aren't bad, mostly to me that looks like her natural variation. Her numbers really weren't that high when diagnosed, and then with the switch to LC that has probably helped as well. With the occasional exception, it doesn't look like she really goes very high on her own. Which is partly what makes me think her dose is too low now - just doesn't look to me like it's doing a whole lot.
If you want to hold it another day or so just to be sure I think that is ok as long as she is doing reasonably well and you don't have any ketones. I would go ahead and raise, but that's me. How is she feeling & acting?