Let's analyse or more like scrutinise the Mariners' performances throughout A-League history thus far.
Season 1
A tremendous effort right to the end, only to be hard done by in the Grand Final. Lost just 5 games in the regular season and a 9-game unbeaten run to finish it. Heffernan's ability to get goals from left-back a highlight. Arguably exceeded expectations.
Season 2
No Heffernan, and injuries contribute to a poor season. Scoring goals evidently a problem, defence somewhat less so considering only Melbourne and Sydney conceded fewer. Some good results followed a slow start to the season, but failure to make most of home games towards the end of the season proved costly.
Season 3
The Mariners were actually tipped by quite a few people as darkhorses before the season started. A strong start to the season and generally in and around the top before winning the Premiership in the final round on goal difference ahead of the Jets. However, this was the lowest points tally thus far to win it and 7 games lost was a third of 21 games. In truth, the Mariners and Jets were the best of a bad bunch- it was a very poor quality season with a lot of the football on show from most teams hard to watch. Nothing much to be said about the Grand Final.
Season 4
I expected the Mariners to go backwards following the loss of Pondeljak. However, the side was able to remain in and around the top 4 all season- the comeback games in Sydney and Adelaide the main highlights, and a couple more thrilling games besides. Defence became a huge problem, scoring goals less so. However, the season finished on a downer following the loss of Jedinak. Three losses in a row was followed by an exit from the finals. The tally of 28 points is the lowest a team ever qualified for the finals, helped by the extreme incompetence of the four teams that didn't make it.
Overall? I'd say that McKinna, on the balance, has done an excellent job to keep the Mariners competitive, consistently there or thereabouts and outdoing some better-resourced clubs. The Mariners have been one of the best run in the league- and the best run club in NSW, although there isn't any competition for that
However, the line between stability and stagnation can be very thin- and nobody wants to be what Man City have been over the last 30 years, or Spurs in roughly the same period, or Newcastle, Sunderland or West Brom over many years in having a constant revolving door. However, the warning signs have been there for a while now, that McKinna
may have taken the club as far as he can as a coach, and that a review of the direction of the club may be needed.
This is a league that will become significantly tougher and the stakes higher from next season. Expansion will mean new teams, new competition- and a less forgiving environment to operate in.