I so hope that this is a joke.
Why? You don't like jumping mechs at all or jumping Atlas only? O:-)
Then, You may consider this as rare item sale - Unbound's Jump Pack been part of BT-universe for 21 year, and now You can buy it for mere 25$ and with customized Atlas as bonus.
Glue it to some other mech, which do you have. How about jumping Awesome? It's will be... mmm, simply awesome, no? :)
For me,
I like limited jumping mechs, they really stand out on my shelves, filled by dozens of other minis.