I know a bit about Brighton story, the then loathed owner controversially sold the Goldstone Ground to pay off debts, with no replacement ground, Brighton exiled to Gillingham for a couple of seasons, & amonst that backdrop ended up nearly out of the Football League, had to get a point away at Hereford on the final day, Brighton got a 1-1 draw & stayed up, Hereford went down. When Brighton returned to Brighton,they then had to play at the Athletics stadium which was totally unsuitable for the Football League, as took so long to build there current stadium because of all the planning inquiries the stadium development went through, then had to go through the Government.
As for Birmingham, bonkers to sack Rowett, they were only 3 points off the playoffs at the time, deserved what they got after that decision.