Hopefully someone can enlighten us. If it does turn out that 7.5 gets rounded up to 8, I would love to know the reasoning behind it as it would just seem bizarre to me.
Yes, I can confirm that.
6.5 <= enth. < 7.5 --> enth.=7
7.5 <= enth. < 8.5 --> enth.=8
and so on
There's a simple confirmation: if you CT a game at the start of the season, the enthusiasm drops from 5 to 3. Since it is confirmed that CT'ing a game cuts your enthusiasm to half, this means that 2.5 is rounded to 3.
But it's not only that, I've been analyzing my team's enthusiasm fluctuactions in the past seasons and it's quite obvious that the number is always rounded to the closest integer (x.5 being the only ambiguous case, but it's common choice in mathematical functions to round up in that case, just try the ROUND function in excel and you'll see).