The Zeal was by far the most heavily armed mech out of the standard mechs assigned to the mission.
The heavy artillery mech also happened to be the greatest liability of the strike force.
There was no hope of escape once the Zeal lost the transphasic lifter platform that granted him limited flight capabilities. His enormous mass combined with Reticula Corein V's heavier than usual gravity turned every attempt at gaining altitude into a herculean struggle.
In fact, Task Force Solus could have prepared additional measures if it was willing to delay the start of the mission.
Ketis could have designed a larger and more powerful lifter platform.
She could have fabricated a spare one that could help the Zeal escape if his original platform became inoperable.
The Larkinson Clan also had the ability to order and ship in a much better designed lifter platform developed by a reputable third party company.