Funny, I was just thinking about the Alacorn.  

   I also have a soft spot for the Ontos (if perhaps only because of the battle history from TR3026, with the opposing force unexpected running into 144 lasers fired at once...)
At a convention in January this year got to try out the new battlefield support rules for vehicles.  In the context of the large battle that was raging, I liked them.  Felt like they supported combined arms play w/o much overhead and while still emphasizing the mechs.  I might enjoy assigning different damage numbers to each range bracket, or maybe just giving a bonus to one bracket for vehicles that are optimized there.  But even as-is I thought they ran well.