Which "other diabetes group" are you referring to? There was a group of people that left here and started a FB group, that never followed TR. They sort of followed "whatever the lead person of the group said" as their dosing method. TR has been published as a peer reviewed article in vet journals. Since then, I've see many spreadsheets of acrocats getting full dose with green preshots - and I can point to some who were shooting much higher doses than you are. Of course, they had to work up to it, gather lots of data, and be able to test as needed.
Shooting lower preshots with Lantus and Levemir usually ends up in much flatter cycles. We call green preshots a gift. I loved shooting Neko in the 80's, which seemed to be her sweet spot, cause it meant that cycle seldom moved more than 10 points the entire cycle. Of course, shooting low blue, then low green, took a lot of courage the first few times for me. It can be something you work up to. Eventually I hated shooting higher numbers, because I had no clue what the cycle was going to look like after that. Greens and low blues were easier to predict.