The way I see it is that you have to separate between football which is executed to be boring (but efficient) - and football which is boring because players perform badly / are out of form.
Louis van Gaals football was horribly boring - his plan was to pass the ball around 5 million times and hopefully get a goal after keeping the ball in the team for 5 minutes. David Moyes football while at United was boring - it was long balls, set-pieces, crosses - and signing Mata and Fellaini took away the pace in our attacks.
If you put Greenwood, Rashford, Martial and Bruno on the same pitch - you don't want to play boring football - but if we put 9-10 players in defence and try to counter-attack - it will be boring if 2-3 of our attacking players have an off-day. But if those same players play to the best of the ability, we can counter any team in the world to pieces - that will not be boring to watch. Jose Mourinhos first Chelsea-side was probably the biggest experts on this type óf football - they could sit back with an incredibly strong defence and then hit teams on the counter - with great pace.
I think this is the same kind of football Jose wants to play today with Spurs - but he hasn't got the players for it. Score a goal - defend and hit teams on the counter. But Kane and Son alone will not be good enough at counters, and defenders like Rodon, Sanchez, Aurier, Reguilon, Dier - they are not good enough to shut teams out. And at the same time - Højbjerg, Sissoko, Lamela, Lo Celso are not creative enough to turn defence into attack - so even if they win the ball back, they can't set up Son and Kane. Spurs were defending for 45 minutes against United and I counted only 2 decent attempts at counter-attacks despite us having most of our players in the Spurs-half during that 2nd half.
Manchester Uniteds football has been boring from time to time this season - but that has been because several of our attacking players have been poor. Greenwood has only recently found last seasons form - Rashford has been struggling with injuries and form from time to time, Martial has been a shadow of the player he was last season, Pogba was poor in the first half of the season and Bruno has looked jaded.
Now when these players start to hit form - we don't look boring anymore. But I don't Think our coaches and our manager told the players anything differently today than they did against Crystal Palace. They want us to play in the same way - it's just that we now have in-form players - and then everything looks much more exciting.