Since you are developer and you try to listen, I will try to be a little calmer and try to explain it better.
I don't have a motivation and even I can say that I hate to do non-sense things. To have one match less just for one week when your training plans depend on that seems a non-sense to me and as you can see I get quite nervous and even angry. The desire to find a sense is not just for the game but for everything in my life also, call it character or something. Yesterday I wanted to quit the game for the reason of this non-sense change during all-star week. Maybe if i didn't have U21 prospects in my team I would do that since I hate to do non-sense things and the feeling is I am being forced to change in training plans, in players' arrangement etc. Or maybe if I didn't have U21 prospects that I want to train maximum better, I would just ignore this week for not being angry. Last seasons I trained 4 players in two positions and that's why maybe I didn't notice this all-star week thing. But now I am trying to train 3 players with one position and I need 3 matches and I see the problem with this all-star thing. It is like quite a job to be forced to make all this rearrangements in my team just for "nothing" because after that you re-arrange again as it was before that week. Now I want my 20 old players to be 22yo and just ignore this week and wait it to finish.
For non-sleepy managers like GM-jokery and others, they can rearrange every match if they want. They have also opportunity to make non-sleepy changes in the end of the season. But in the end of the season there are more reason to have only 2 matches. Teams has to rest a little bit, new players are coming from the draft and you can implement them in your team and training plans, also you can choose a strategy to train free-throws or build a free-throws center, or training stamina or something. Also, I don't know why people that comment me see things as black and white. I try to find the balance, I never said that in the end of the season it is non-sense to have 2 matches. Even I can find of lot of reasons and just make sense. It is good to be a little bit difficult for the teams but let it just be at the end of the season and not two times which is for me too much and the all-star week is non-sense and you have to make a lot of changes too fast for too little time (just 1 week) etc. Maybe for old teams it's not a problem but for new teams is not so easy and pleasant thing as you see.
Also, all-star match is Wednesday when BBM matches are played so Tuesday is available for a match to happen. I think national cup match possibility is a motivation by itself to go to these rounds and even further. Why to need more motivation to do it? You are also gaining money if you want more reasons to not drop out of the tournament :) I really don't think that 3 matches are the big motivation here. Since Tuesday you have league matches by program, maybe it is really a good idea to have automatic scrimmage/friendly match. But if not, I will arrange friendly myself if it is needed to do it 2 times. But automatic friendly is better really because you have little time. You can use bot teams in every country to play agains teams that are missing opponents because of the National Cups.