Both.
A good manager can blend a team of adequate players into a successful side. There is now a massive worry if Mowbray can do that, especially after witnessing that @#/? today. He seems to think we can keep it tight and almost overpower the opposition to get results. Like we don't need to work at it.
However the squad is simply not as good as people thInk. On what they have showed in Rovers colours, the players simply lack the talent people think they have.
As defenders, Ward, Caddis and Williams aren't great. As cultured as Mulgrew is on the ball, he's not the best out and out defender. Downing has done well fortunately, but we're solid rather than blessed in defence.
Midfield,is a funny one as it has improved since relegation. Smallwood shows up how bad Lowe was and we have a lot of average options. However, none who started today have anything in their game to unlock a defence. That job falls to Dack and Chapman but they are currently benched. From what we have seen Dack is living off reputation though. I'm Yet to see his true value.
Up front is another quandary. Grahams purple patch (10 weeks?) ended long ago and neither Antonsson or Samuel look like they will create lots, or that they will sniff out 20 goals. I think this is another area we seriously lack in.
In short, watching how the games are panning out, Mowbray should be doing better as we are playing poor and being overrun in many games. However I still don't believe we have a squad that is in the best two in the league.