The attached file is a perfect example of indiscipline, and quite appropriate for Blues Ox. In that game the Fev forwards were definitely under pressure, although Fev fans would argue that it was more to do with the absence of Bostock, Wood, James, Bussey and Maitua than the dominance of Cahalane, Moore, etc. What was inexcusable though was the sin-binning of Luke Cooper in his first tackle of the match. It was fairly obvious he hadn't been instructed about the team warning as he entered the field of play from the bench. Fax scored from the resultant penalty and registered two further tries while he was in the sin-bin.
Its hard to judge like you say in the 8's. Players tend to give more penalties away when they are tired and t.hey usually get tired quicker against better teams. You only have to look at how Leigh finished the season and the penalties and lack of fitness cost them big style.
That is the sort of error that Jon Sharp is likely to eradicate.
On another note, that was the last of Gareth Carvell's five appearances for the club. He was totally ineffectual on that day and clearly not fit. Fax got much better value out of Moore and Cahalane, who's to say that Sharp won't get good value out of his signings?