Looking at the various Keshiks of the various Clans, they read 100% Omnis. Surely the Falcons have plenty of totem 'Mechs in their Keshiks. Surely the WiE have a Hellstar or some other nasty 'Mechs in their Keshiks.
if they are 100% Omni, then the Falcons in fact
don't have any totem 'Mechs in their Keshiks (are any of the Falcon totems Omni? I don't recall off the top of my head), and the WiE
don't have any Hellstars in theirs...whether you think that's weird or not, that's how it is
On top of that, the RATs have... one or two Omnis for each weight class?
How is this meant to be used? Using the Keshik bonus to the roll, you'd end up with tons of the last 2 or 3 'Mechs from the list. Am I reading something wrong?
the RATs are used to quickly create faction-flavoured units, so if you want to roll up a Falcon Keshik without digging deep, you can use the RAT to get something that feels Jade Falcon in composition, but it really has nothing to do with the Force Deployment listings
if you want to create for yourself a 100% Omni Falcon Keshik, you can't use the RAT and would have to manually pick which Omnis you want that the Falcons have access to
(I mean, you
can use the RAT, but like you said, you end up using just like 2 or 3 Mechs)
alternately, if you still want it to be random, make your own RAT of Falcon Omnis, just put the most common ones in the middle, leading to the more rare ones at top and bottom