Yes that is fair. Not just Davies either, Calvert Lewin, Keane and Richarlinson have all improved markedly under him and he has began to get the best out of Digne/Gomes/Mina.
The difficulty he has is his game management isn't really his strength. I always feel if he has time on the training pitch it will work well, but in game we don't respond that well. I'd also add, he will probably regret not implementing his style (which I believe today is close too) much earlier. I think supporters would have given him time last season had he done so and we'd have it more bedded in.
His challenge is to get enough results in the short term, so that the wider good work he does in the long term can be seen.
Today could be a big turning point though. He has stumbled on a set of players that look well balanced. Keep playing them and try not to deviate too far. We are still in touch with sides above us.
I'd like to think that, but the question would then be why on earth did he wait until he was faced with the sack before doing it?