Bingo, that was the point I was trying to make. Trying to include both Bruno and Grealish in the same side would mean asking one of them to do a role which isn't their specialty. Bruno hasn't ever played as a RM, which was Eriksens role for a while but later he transitioned into a proper CM. While Grealish would no doubt thrive as a 10, that would mean playing a formation which has gone out of fashion in recent times, and it would mean deploying Bruno in a deeper role.
I think both Bruno and Grealish while play with different styles are similar type of players. They are at their best higher up the pitch, when all the plays funnel through them. The only bit I would like to point out is that Grealish is a good dribbler and can take people on, which is why he's been so successful as a LW. We can play him there but that would mean, switching Rashfords' position back to CF.
We had our shot at buying a creative attacking midfielder, and we made the choice by signing Bruno. Addition of Grealish would likely create more headache than solution to our problems. We're better off prioritizing a RW, DM and a CF, all 3 would improve our functioning as a unit.