I would like to see the training expanded so that you could familiarize yourself with titan weapons. You get (if I remember correctly) chaingun, vortex shield and rockets. I just think it would be a little better than with a weapon you know nothing about. Being able to familiarize yourself with other weapons would be a great help for some... myself included.
Interesting idea. In particular it would be good to have a target that would register how much damage has been done. This way you could assess damage vs distance and parameters such as that. For example, the quad rockets are awesome with lots of sound and explosions. The other night I emptied round after round into both a Stryder and an Ogre. They stood there and laughed in my face. Down, down, down I went. This was at close range and with good hits. Don't say it. I know. I suck. But I will continue to use the Ogre with Quads when I get bored and want to have fun making noise and hope the sheild core keeps me alive.
Or even an open "play" area that doesn't affect your K/D or stats (which mine suffered when Gen'ing up)