There is a reason why most RW armies are on a triangular formation, it's because there is an upper limit on the number of subordinate units a commander can keep track of.
It's really more than 3, but varies from individual to individual, however if you are losing track of all your units it's a sign that your attention is too divided.
In 1v1 you have to worry about:
All your units
All the enemy units
All the points
If you spread out across the whole map in 4v4 you now have:
4 x As many enemy units
3 x New Allied units
All the points
Your own units
Which is about 3 times as much workload to keep track of which should be enough to account for your issues in microing everything
The other thing is that by spreading out in such a manner, you probably wouldn't be bringing enough force to each battle in order to make a difference.
Further, if you have sent units to the other side of the map it takes them a long time to get there and a long time to retreat - which means your field presence is diminished and you become less effective
Blobbing is noobish (sometimes), concentrating your force isn't.
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Most, but not all 4v4 battles fall into clear sides. City 17 being a good example of that, as it often turns into 2 x 2v2. Helping and cooperating on 'your' side is generally better than spreading around.
As you get better "reading" what is happening in the game and keeping track of what your teammates are up to becomes more important and easier. It might be that the reason you are your teammate have won where you are is because you were only up against one player, in which case you need to make sure your teammates elsewhere don't get overwhelmed because they might be facing 3 v 2
Yeah, I am committed to keeping this up to date, but we had two patches in two months, I am away right now and then the Brits drop so I am not updating this until at least late September