I was jus wonderin as when i was first diagnosed, i was in the grey area but they started me on insulin to be on the safe side incase i was actually T1, which after the hba1c test confirmed i am.
Here's my opinion. Take it for what it's worth (not much), but decide for yourself what you want to believe.
1.) "Type 1.5/LADA" is a stupid term- there's no clinical set of standards to diagnose "Type 1.5" which makes the diagnosis entirely subjective. Unfortunately, this often results in "Diabetes limbo" where patients aren't treated as if they have type 1, and if they're treated as if they have type 2 the medication will eventually become ineffective (often Metformin and Glicazide).
2.) In my opinion, there is no "Grey area." You either test positive for GAD 65 antibodies, or you don't. You either have a C-peptide level below normal, or you don't. An A1c test can't confirm what type of diabetes you have just like a normal A1c result doesn't mean you no longer have diabetes...it only means you're well-regulated.
My background:
February 2015: I had an annual check-up for my health insurance (I'm in the US) that said my fasting glucose was 140 mg/dl (7.8mmol/L). The test was poorly executed (they also said I had 30% body fat when it's really around 12%) so I didn't think anything of it.
September 2015: I end up in the emergency room with a blood sugar level higher than 28mmol/L and probably closer to 33mmol/L. My a1c was 13.2% at the time. That same week I start basal insulin (Levemir), two weeks later I start bolus insulin (Novolog/Novorapid), and three weeks later I'm using a Dexcom CGM.
December 2015: After I finally know what's going on, I drop my a1c down to 6.0%.
February 2016: Fast forward to a year after the first sign I had diabetes and I still produce some natural insulin. Under perfect conditions, I can still keep my blood sugar regulated (with the exception of dawn phenomenon) without any artificial insulin. However, that means <30g of carbs, <200g protein, lifting weights for 1+ hrs, and running 5+ miles each day. Even then, there's a 50% chance I'll need to bolus at some people during the day.
Final thoughts: Not once has anyone ever suggested that I have "Type 1.5/LADA." However, by some people's definition, that's exactly what I have. 99% of the time I need artificial insulin to make it through the day. Sometimes I need as much as 30 units/day and then there are those rare occasions when I might need less than 5.
Aside from saving money, I can't see why a doctor would ever keep insulin from someone with an auto-immune form of diabetes. Best case, you don't need it and it sits in the fridge. Worst case, you do need it and wind up with DKA.