They currently have a signed agreement in place but with a flat cap and the need to bring in more young talent the need for change us becoming more obvious.
The talent level of the elite JR players is also growing as well on an individual basis so more flexibility in getting some of these kids to the pros sooner to speed up that development needs to evolve as well.
To grow the game requires growing the talent. If an elite talent isn't going to develop at a rate they're capable of your stalling the progression of that player and the game.
For some teams there is the financial aspect as well. After an expansion draft the NHL certainly doesn't want to face a scenario where some teams start to struggle. The excitement and financial advantages of younger, cost controlled players that have an extra year or two of AHL level experience before making the NHL provides the opportunity for these kids to have a bigger impact sooner.
It also puts these kids on an equal footing with every other kid their age when they're drafted, at least those in the first two rounds.
When you look at how many kids in the first couple of rounds actually make the NHL or AHL at that age, it's not many so the overall impact to the CHL probably won't change that much.
Without changes though, especially if this happens this year the negative impact could be huge. How many high end kids may start looking at Europe as a better opportunity after that chance became available this year?