Sorry this is all broken up, but I keep remembering little bits and pieces:
Brent mentioned that he wanted to get mercenaries back into the setting in a bigger way. He was lamenting how the jihad killed off so many and moved more towards a house-army sort of setting. He thinks the company sized Mercs unit is a great thing for telling a story for players, and we should probably expect small merc groups to be much more common again in some form or another.
Interesting. Personally i'm not a big merc fan as i don't care for creating my own, and i don't care for extant units, especially since most with interesting stories or logos/tactics/colors tend to be bigger ones. (And the most storied ones slipping into mary-sueish territory doesn't really help at all.) But smaller scale, more options... that might work.
Scale is one issue i see with BattleTech. I realized that as i read Succession Wars sourcebooks. I couldn't quite follow what was happening. Massive armies at massive scale... it is just difficult to comprehend and follow, and in the end it becomes just numbers. There is no personal touch, it is not character-driven.
I mention on the previous page how i see dryness small an issue, and mention sourcebooks needing a voice, and this ties to the "personal touch" and character-drivenness. One reason Operation KLONDIKE works well is that the Clan armies are small and their leaders and other characters have their own quirks even though the book is otherwise a historical treatise really; it tells a story of many small things.
Smaller units, mercenary or otherwise, are more conductive for that, perhaps.
(Note, i don't mean to imply scale is an issue for devs, just that i see it an issue. Not that i have any idea how it can be helped without blowing up 90% of the Inner Sphere.)