McKenna has had 11 months longer in role... But started a league below. Ipswich have since stepped up to this level and then some. Rosenior's tenure with us - he started at this level, plugged up a sinking ship really effectively and as of right now has marginally improved us. Obviously we'll have to see where we are at the end of the season to get a better idea on how far we've come in a year and a half.
There are potentially mitigating factors which help explain the recent downturn in form which has effected our league position, but I truly believe the biggest reason for everything and the reason which overarches all others is the style of play, the flaws with it, and our unwillingness to make alterations to it. It's great at nullifying the opposition a lot of the time, purely because it boils every game down to very fine margins, with usually very few major chances going either way. Our scorelines even when we win are rarely convincing, and as we've seen too often goals can come out of nowhere and sucker punch you - we've dropped a lot of points this season from trying to control games that we should have been trying harder to get ahead in, or killing off when we'd taken the lead.
From what I've seen over the past 15 months the system we insist on sticking to is limited. Persisting with it doesn't to me suggest we'll get our just rewards, it suggests we'll remain at that level and not ascend to the next one. There's time to change this by tweaking the way we play, but the willingness, common sense and desire to change it has to be there - and the thing that scares/baffles me is that I don't think that's going to happen due to what seems to be a misplaced ideal that what we're seeing right now is the most effective way to play football... It's either I'm correct about the above or instead the finger should get pointed at the players for just not doing as they're asked. After so long though, I can't imagine the latter can be true.
The biggest three reasons Rosenior should be reassessing this style of play right now...
Mounting pressure
We don't create many chances - this isn't a recent thing, though it has gotten worse over the past month or so
We haven't won since Southampton away - probably our best performance of the season. That was 20th February.