For a newbie futures trader like me, micros have been a blessing
Having to trade 1 ES contract was super hard for me in the beginning, because you technically have 1 entry and 1 exit. Unless you are a pro's pro who already has an edge and been in the game forever, being consistent with 1 contract was super hard. Heck you might have a good entry, but where shall you exit? You could exit at A, B, or C. But you can only exit 1...
Now with the addition of micros, you could enter at A(proportionately to the risk and confidence you have on the entry) and let's say the market breaks below A and goes to your next entry level B(still within the risk level from A but now a LOWER risk and increase in confidence) you have the option to enter more contracts here.
Same thing with exits- Now instead of having to wait for the perfect exit (almost impossible as market can do anything) with 1 contract, you can get out of your bad entries (A) at break even, and let the positions you entered at B ride. Or you can manage your exits in fifths, thirds, halves. The flexibility is amazing and I don't mind the cost of commissions.
With the introduction of micros, my profits have become a lot more consistent vs having to trade just 1 contract.