9 times out of 10 the more attacking the football the better chance of success. So lets run look at Barca, Bayern and Real Madrid. The three strongest teams in Europe. I'll look at Man City as well (England best team despite league position). Who else shall I look at?! Monaco, top of their league average 4 goals a game?
There are anomalies which allowed 'defensive' teams to get success. Lets look at Atletico (La Liga winners 2013/14) or Leicester last season. But for them to have success they need to attacking teams to drop off a few level/s.
Therefore Steve Bruce gaining promotion previously is an anomaly.
Our chances would be increased with attacking manager/football.
Therefore we should get rid when we are safe and getting a higher calibre manager in.