I have been on insulin and on oral meds, and am currently on Byetta, which thank the Lord, is working for me.
Insulin made me gain weight, yes, even Lantus and Levemir.
What your endo will probably do is run a c-peptide or a GAD immunity test and possibly an insulin resistance test to see how your pancreas is functioning now.
You can run the risk of burning out what little Beta cell insulin production you have now by going on Insulin too early. That is my case.
However, when I was on insulin, I found my life was a little freer in the sense that I could eat more of what I wanted, although I did do a low-carb diet then. Of course, it wasn’t freer in the sense that I did have to test more frequently, and I did have to inject more frequently. Now, I really have to watch my diet more. Also, I had to watch how I exercised when I was on insulin.
There are pros and cons to every management plan, but if you can get away with your pancreas working, even at half speed, for as long as you can, I would say give it a chance.
But you are so good and right to want to be aggressive about managing your T2. So many of us don’t get the benefits that our counterparts, T1’s, have - that sense of early advocacy and ownership of our condition, so we tend (notice I am generalizing here) to not manage our disease as urgently.
It’s good to be on top of things, and read, research, and talk to others.
Everyone’s diabetes is different, but having a great attitude in wanting to lick it is always good!
Oh, and btw - my BSs were managed under insulin, but never as low as they have been now w/ Byetta and Metformin for 6 mos.
Good luck and Godspeed!