I also think JW is right but there are a couple of extra factors. You guys saw the division III survey I did, there are easy divisions where a 100k team can take you to the finals, then there are ones like DFBS and Vis are in where it is brutal. Just because you make it to division II doesn't mean you have a strong team or are a great coach.
It is better to be lucky than good.
We have been predicting how teams will go and on paper we look much stronger than the XBB however first not all teams are guaranteed to win their playoff series, second up to 4 teams have already indicated that they will be have a "rebuilding" season next season and may be a lot weaker than this season. You already know about Iwen and Naker, but there are possibly two more. You take a team which should be up the top like Naker and put him down the bottom with PossumPete and it changes things a lot.
Being in division II is clearly better, but just because you are doesn't mean you have to have a better team than a division III team.
With regard to enthusiasm I saw a LOT more crunch times in division II than I ever did in division III. I got crunched about every two weeks in division II, you can manage your enthusiasm but there is a lot more pressure.
As for stopping the growth of your team, if SAS was still in division III next season it would be Smeltz and 4 lucky fans.