Yes to everything Kris said. So here is the pattern:
1/11 AM good
1/11 PM high
1/12 AM good
1/12 PM high
1/13 AM high
1/13 PM good
1/14 AM high
1/14 PM good
1/15 AM good
1/15 PM high
1/16 AM high (?) she nadirs late, so not sure on this one yet
The good cycles have blues as a low number for the cycle. Those are the cycles we look at - and at how quickly she moves from a high to a good cycle. Many cats will go good-high-high-high-high.... and then finally get another good cycle. Goma is moving quickly from goods to highs which is a great sign. The goods are also pretty consistent at this point - mid-blue. So far she's being nice and predictable, which is great. The mid-blues are good, but they could be better, which is why Kris suggested a little bump in insulin.
You are right that she could end up with a low cycle when you make the increase, but then she'll most likely settle back down, and hopefully with a slight improvement in the nadirs, and hopefully with the effect of starting to pull the PS numbers down a little lower at the same time.
One strategy you could try if this all makes sense, but just makes you nervous, is to increase in teeny tiny increments. We call them fat and skinny doses. So you don't go all the way from 2.5u to 2.75u at once - instead you go to 2.5u, and then just a teeny bit more for a couple of cycles (a fat 2.5), then a bit more than that (a skinny 2.75), and finally the 2.75. On the spreadsheet then you would type it in as 2.5F, 2.75S, and then 2.75.
And as Kris said, it is always up to you if you want to try this or not. You know Goma the best, and we are always here to support you and walk with you no matter what decision you make. I definitely believe in mama-sense/papa-sense and will trust that you are always making the best decision.