I'm actually surprised that upping meds was discussed... Your HbA1c has massively improved, taking you off metformin would've been the logical choice of topic. Besides, with your HbA1c now in the prediabetic range and headed for non-diabetic, and your weight loss on top of that, the mortality rate is going down significantly as it is...
Just.... Baffled.
I had a consultant appointment at the hospital after my HBA1C dropped from 87 to 33. The consultant put my from 1000mg a day to 2000mg a day as he stated it had the best long term outcome for patients.
Generally in his view the long term studies show that mortality rates for diabetics even with low HBA1C scores were better on metformin then not. There is a general view that reducing or removing the meds leads to a rebound in allot of cases thus he didn't want to drop it and infact increased it in my case - not withstanding that it is supposed to reduce the risk of heart failure.
It took two further 33 and 30 HBA1C scores for him to grudgingly accept that i was dropping it to 1000mg but he point blank refused to accept i should stop it entirely and should listen to him as an expert in diabetes.
There are certainly studies and reasons that Dr's prefer people on metformin - in the end if you choose to follow it is your own choice but its not just local GP's who are following this route. Because of my age i was under hospital consultation and the Dr who had these chats with me specialized purely in Diabetes and nothing else so had certainly allot of knowledge on the subject and wasn't just a local GP with passing information.