I went from elite to legendary.
As a european I wondered how my ping works out and indeed at the beginning lighter mechs were a no go for me - with the jenner I constantly ended up in enemy mechs or walls or I fell off cliffs due to combination of bad ping and jumpy fps rates. So the best lag resistant mech in my opinion would be the fire support catapult.
The ping though got better from patch to patch and I learned how to tweak graphic options with the help of the user config file and I again tried out lighter mechs. I promptly fell in love with the Jenner, which in my opinion is one of the best mechs if you want to drop alone, because if your setup is right you can pick your fights and disengage most of the time without problems.
Now with my heart lost to both of those beauties I had to make a decision - and it was easy to throw in an additional 60$. An additional benefit is, that with two premium mechs you can grind money really easily - as when you got destroyed you can jump into the other one.
Now regarding the Atlas and the Hunchback I have to say that only the Hunchback is a bit bad in my opinion, but I think this really is because of my playing style. I am experimenting a bit with a gauss rifle atm and it looks promissing, but when the game goes open beta I will concentrate on Cats and Jenners first I guess - a bit of Atlas in between but the Hunchie will catch quite some dust I guess
So overall I am happy with my legendary package!