I think GENG and TH in 2024 set a bad example by fully rebuilding their roster and immediately having success. Because of that now every middling to bottom teams are blowing up their whole rosters after a bad season and they are missing key part of what makes a good team - chemistry.
I think to achieve consistent success you have to at least keep a core and build around 2-3 players and bring in a new young talent. You must have a good igl as well. There are way more teams who found consistent success with keeping their core and changing like 1-2 players:
SEN 2024, SEN 2025, FNC 2023, FNC 2025, G2, PRX, RRQ, even C9 and NRG this year and so much more.
All of these teams just made 1-2 roster moves and improved gradually or just stayed on high level.
But now all the teams who finished bottom half of the league are making 4-5 changes every year and blowing up their rosters and I just think its same playing russian roulette and seeing if you get lucky or not