Shield got 7 yellow and 1 red card.this season. Another Middleton?
Without having seen him play - but based on 2018/2019 stats and how we have all seen the way Middleton conducts himself on the pitch - I wouldn't think so.
Ken's stats shows that Ben made 22 appearances in 2018/2019 and had 6 yellow cards and 2 red cards.
Luke Shiels made 36 appearances and received, as you state, 7 yellow cards and 1 red card (do we know how this came about, was if this was two yellows or a straight red?) I don't really believe that 7 yellows in 36 games for a central defender is excessive, especially given how easily refs produce them these days.
The rate at which Ben was picking up cards, had he made 36 appearances he was 'on target' for 3 or 4 more yellows and another red. And we know that most of his are as a result of some reckless tackles, and often quite stupid decision making. 10 yellows and 3 reds in 36 appearances probably would be counted as bordering on excessive.
I suppose we'll soon see though after a few matches if Shiels is another Middleton, or simply a hard robust defender more in the Pearson / Pidge mould. If he is - or even if he's just a little below their standard - I'm sure we'll not be too concerned with getting 7 yellows over the course of the season.