...the Free Worlds League has had a serious shortage of assault 'Mech production capacity for the past 20-25 years. ... As a result of this problem, the League's assault battalions have become increasingly populated with Orions, Warhammers, and other lighter 'Mechs, placing them at a distinct disadvantage against equivalent units from the Lyran Commonwealth, which are well-stocked with new Zeuses and Goliaths. (page 114)
The shortage no doubt began with Anton's Civil War (the Irian plant reopened
quickly*, but perhaps not at full strength). I suspect it also coincides with upgrades to the Lyran Furillo plant, and a general retooling of
Commando lines to produce heavier 'Mechs.
I could dismiss the remark about new Lyran
Goliaths since the closest similar statement in the Steiner book names
Zeuses and
Atlases instead; however, it squares with TR:3025's assertion that the majority of
Goliaths are in Steiner hands, and it's possible that the FWL only recently recaptured a
Goliath factory from the Lyrans. Stewart is a bit far from the border, but Oliver is an attractive candidate: it's the
Goliath's original production site, it's right on the border, and it loses production capacity so regularly that a silenced
Goliath line wouldn't be remarkable.
It's convenient that
Orions,
Warhammers and "others" (which I'll take to be
Marauder-Ms) are named specifically, because I can assume the Lyrans produce an equal number of assault 'Mechs. Likewise, since the book doesn't note any similar shortfall or advantage against Capellan forces, I'll assume that assault 'Mechs occupy a similar fraction of Capellan manufacturing.
Except for the period between 2953-68, when it controlled the Liao Atlas and Victor production facility on Carver V, the only new assault 'Mechs produced by the Free Worlds League during the past century have been Awesomes, BattleMasters, and Goliaths. As a result, the League's regular regiments have become increasingly dominated by medium, 45-60 ton 'Mechs like the Phoenix Hawk, the Hunchback, and the home-grown Hermes II. (page 115)
The "45-60" tons might look like a typo, but I'm not sure it is. A lance of 45-60 ton 'Mechs (210 tons) is about average for MW1e's "medium lance," which I believe corresponds with the typical weight of BF1's regular medium regiments. Regardless, medium 'Mechs aren't dominant due to production--Marik production of mediums is actually shorted a bit in favor of heavy 'Mechs. The mediums just aren't suffering as much attrition.
To be continued later.
*EDIT: it did reopen quickly once they started rebuilding it, but they didn't start rebuilding it for close to a decade.