in that case you discriminate users using GMs as they are exluded from playing user with advanced knowledge, ergo they will always play easier opponents and never get to the level of competitive player what will lead in a future to competitive players coming to regular rounds and crushing everyone with highly advanced strategy.
the thing is- competitive players develop strategies all the time. When they found new one they learned it and try to counter it. With counter ready they can win a war but still they have to think in advance and look for strategy that beats their own counter. I had the same with planes and right now I am on counter strategy against lvl3 planes. This means in general I never meet guy who uses lvl3 strategy like me but I already have counter against it if someone learns my strategy. Then , fighting this player I will be able to learn lvl4 strategy.
When you play GMs then there is no need for improving strategy, you just focus od spending less and less GMs so you strategy is not becoming better , but cheaper.
As I wrote somewhere- I meet a n account which was using Golden Fighter Rush. it was on level 1 strategy when it comes to planes so I killed hundreds of its planes loosing less than 50. it never thought about changing strategy but sticked to Gold strategies more and more. Seeing he is loosing more than 10-1 he started to create Golden stacks with 0 inf. You can guess what happens to them if they are hit by Bombers. So war turned into series of mindless golden waves produced from empty provinces- just to make sure he is pushing me back. But you cannot catch planes with land units so after loosign dozens of milions troops , around 6 mln GMs and 10-20 provinces he left a map in which he had 2200 provinces against mine 500. OFC he had supporters and they almost win a map as coalition but I managed to convince supporters to stop fighting me and wait for a result of war with top player on the map. Thing is he never tried to change his plane strategy, he just moved to another Gold strategy he knew and it was worse than the first one.... It cost me a lot of time - I guess I had to increase my activity like 3-4 times but this is a resource I can scale with 45-90 min spend per day on active maps. he was not able to scale time as account was already active 24h/day and the gold run out after a week. He did nothing to innovate his strategy, check with other players, practise counters on another map. He just sat on the account all day and was throwing gold thinking I will resign while I knew it is a matter of time when he will resign.
Wars between GM playstyle and skill playstyle/ active playstyle generate the most gold for Bytro. I do not think they will resign from it ever. That is balancing GM influence is more important. The more chance Skil land active players have- the more gold they will generate from GM playstyle. It is simple as that. But from all 3 playstyles : skill based playstyle is the weakest right now in my opinion if I have to increase my activity several times when I meet good level GM/activity playstyle.