I haven't watched the replay yet, but I can give you some key pointers regarding UEF game play.
UEF vs Aeon
This is a very difficult match up in most of the ladder maps. One way to defeat an Aeon is to control the air. Which will force your Aeon opponent to waste resources getting AA. By then you should have flap jacks. Remember timing is important. Push up the Aeon once his teching from tier 2 to tier 3.
UEF vs Cybran
Formations are your best friend. As much as possible engage your Cybran opponent in formations. In most cases you wont focus on air power because Cybran has the best AA's in the game. Focus on the ground troops and your eco.
UEF vs UEF
There are several ways to win this mirror match up. The usual case is bombers and tech 2 - 3 units. There's not much to say about here. Who ever has the stronger eco usually wins this match.
I'm on GPGnet everyday. Look for me if you want to practice. My username is: GoW-Atmosphere. I'm a top 100 random user, I'm familiar with all 3 race.
Come give me a whisper
Read my basic strats here:
Heavenly Help #1 - Supreme Commander Heaven Forum