In my view the campaign snowballs out of all control very quickly and takes almost all of the mystery out of who is likely to win. The good player will naturally find themselves near the top of the table through good play; they don't need to be further advantaged by rapidly accumulating buffs. (If anything I would argue that a good contest should seek to reduce the gap between 'best' and 'worst', not widen it as this campaign currently does.) Rollover buffs, IMO, are the primary cause of the snowballing and should be revisited. Perhaps only allow each HQ to pick two of their currently accumulated buffs and take those into the next match rather than rolling on in with them all.
I had a bit of a moan about this in my first campaign recording (@ 0:29:00 and 1:15:30): https://www.youtube.com/watch?v=Yjq0BnP4w4A