I can understand why some people are disappointed that RD isn't staying and getting more game time. We all would love to see a young Bees player develop and progress into a top premier league star. And we've all had that Championship Manager moment when we've don't it without loan appearances for someone else.
And RD certainly has that little bit of stardust and is exciting to watch. Hopefully he really has what it takes to become the player we hope he will be.
The number of players who go straight from being a mercurial teen to having a long, successful professional career is very small. Their are countless cases of kids who have shown plenty of promise when first thrust into the limelight who have quickly faded into obscurity through overplaying or the weight of expectations. Brentford have wisely (IMHO) not gone down this route and have given RD a structured route to first team football without unnecessary pressure. It's difficult enough for a kid to reach the level he has without burdoning him further.
There was a comment in the transfer thread about our players in the past not setting the PL alight after playing in the Championship, mentioning Benrahma for example. I'd like to add Ollie Watkins, Ivan Toney, Bryan Mbeumo, Christian Norgaard, Vitaly Janely, David Raya and Ethan Pinnock amongst others who also played in the championship and then struggled to make it at the top level. Oh, wait...
You could also aregue that players such as Harry Kane, Michael Olise, Ebe Eze, Jude Bellingham and aAmie Vardy also failed to kick-on from their Championship (or lower) appearances.
We don't know how successful this loan will, or if one day RD will be scaring the living daylights out PL defenses wearing a Bees shirt. But to turn around and say he's done with us because he's gone on loan to Sheffield United is at best insulting to some of best ever players and also very, very shortsighted.