Is changing organization structure possible in matter of weeks? I don't know.... Maybe it is easier to just pretend the BTGs are not BTGs and have them push as fast as the rest of the formation.
Don't know if there is better way to deal with ATGM ambushes, maybe force recon model? Have some recon unit backed up with UAV yolo ahead, once they get hit have the UAV tag enemy position and pound with artillery. But then well trained ATGM team can choose to conceal themselves until they see big fishes....
Normally it would be hard to reconfigure to a new structure, but this would be a reversal of a recent change back to a much more traditional and simpler structure that experience NCOs should be very familiar and used to.
Russian NCOs have proven to be a major weakness because they seem to struggle badly across the board, requiring senior officers to literally come down and sort things out themselves, much closer to the front line than their rank should have them.
I think a major contributing factor to this is a lack of adequate training to bring NCOs up to speed on how they should do their jobs in BTUs as opposed to h they were initially trained and used to operating in a more traditional formation.
NCOs are like the nervous system of the military, while soldiers are like the muscle and bones and officers the brains.
What the Russians did with their massed BTU conversion was like giving a career boxer an idiots guide to MMA, a change of clothes, a few leg days at the gym and expect them to win MMA fights.
The brain might think of fancy combo attacks involving fists, feet, knees and elbow, but the nervous system just couldn’t get the body to move quickly and effectively enough to pull those moves off.
Moving back to a more traditional formation for the bulk of the military would see the combat effectiveness of NCOs restored and allow the Russian chain of command to work properly again. That alone should seem the overall combat effectiveness of the Russian military multiply.
Besides, the whole point of the traditional Russian formation and combat tactics is to Keep It Simple, Stupid (KISS). Where things are kept simple by design to allow fresh raw recruits to be able to slot right in as replacements with minimal fuss or specialist training and achieve combat effectiveness as quickly as possible since high attrition was expected. It’s a trade off between combat sophistication for ease of use and quick regeneration of combat attritioned units and formations.