I'm sure its scary and frustrating to not really know what you are dealing with, but try to think positively. In my own life, I have really felt like that helps the outcome.
I'm no doctor, but I have to wonder if there could be some other explanation for 1 seizure. Maybe she had a fever or was dehydrated at the time? I had an epileptic dog, I have an epileptic daughter, neither have/ had a brain tumor. Cody does have a slow growing pituitary tumor that causes his acromegaly and diabetes, but he's never had a seizure (or a hypo).
I'm sure most vets, including mine has a BG target of 150-250 for their diabetic cats. This does not lead to remission, but it does keep most cats in a zone safe from hypo emergencies and late night calls.(MOST owners don't test) Per my vets explanation, cats are tolerant of high bg, and if they stay in the lower half of that (under 200), they probably aren't hurting their other organs like kidneys too much, especially based on their relatively short life spans. I'm not saying this is what I believe, just what vets deal with/think.
Since Cody will never go OTJ, and acros can be hard to bring up from hypo, most of us "acro moms" target 250 -150. He's been cruising along diabetic for 3 1/2 yrs... ;-)
But again, 250-150 won't get you remission if you think that is a reasonable goal.
IMO you are fine either way- you have to be comfortable with what you are doing- and what your goal is- remission, or decent control; and how much testing your lifestyle allows.
I think you are doing fine! and must love Squamee SOOO much to overcome your fear of needles etc :YMHUG:
also, Looks like maybe a micro dose possibly is worth a try. maybe .8?