It looks good on paper but we have to realize cricketers are humans and not robots. Players will likely get burned out. Indian players only play in IPL but many other players play in multiple leagues.
Also, if you add Champions League, it means that international cricket will have even smaller window.
Of course the calendar has to be managed properly, that's a given.
Cricket is in a kind of a transition phase between internationals and these leagues and between T20s and Test/ODI.
In next decade as per consumer demand we will get to know which direction cricket is heading. If consumer demand is more for T20's and these leagues then gradually these league's will take forefront and international matches will be restricted.
On the other hand, if these leagues do not gather enough viewership and consumer demand, international cricket will continue the way it is right now.
From cricket perspective it is an interesting decade ahead. With multiple sports channels and sports being showed/played consumer has many options now compared to earlier. ICC needs to seriously think about their strategy for growing cricket as a sport and work on an expansion plan. If you look at the current status, there are only 5 countries which has cricket as a popular sport:
1. India
2. Pakistan
3. Bangladesh
The above three has no competition to cricket.
4. Australia
5. England
Cricket is a secondary sport compared to the major one Football in case of England, and in Australia many sports are played so cricket is just "one" of the sport not the "Major" sport.
Now with decline in SL, SA cricket two more major players might be lost.
NZ cricket will always be secondary to Rugby. Also the population of NZ isn't that high so monetary benefits coming from a country like NZ, will always be limited in cricket.
WI and other nations - The sport is very minor due to various reasons.
Bulk of the revenue currently comes from Indian companies/market. Tomorrow if the mood of Indian public shifts to Football or some other sport or even IPL then ICC will start losing money without any Plan B or expansion in place.
I am sure the ICC management committee already realizes all these points and are working on these points, so will be fascinating to see where they go from here.