I've been thinking about the whole British tax thing.
Firstly, you need British players for the homegrown quota. You can also argue you need some players who understand the culture of a club and the league, which is usually but not always British, but that's debatable and whilst can be advantage isn't necessary. So, you objectively need British players in the squad, that's not disputable.
The question then is one of price. Normally, I don't really care. Its not my money. United have loads of it. Spending 40m or 80m doesn't really matter in the long run - what matters is if the player can establish themselves as a quality first team player. If they do, the value gained from the transfer would well exceed even the higher fee. If they don't, then the value gained doesn't even exceed the lower fee.
In a squad aiming for trophies, you need competition for places. And i think this is the issue. Because players like AWB and Maguire came with big transfer fees compared to their competition, they tend to get given more playing time in the hope they come good. Although, you could argue Sancho didn't get the same, and Antony who wasn't British did. But in general I think it's fair to say British players cost more, and then become more likely to get additional minutes as a result. Ultimately, if they don't prove themselves to be guaranteed first team players, they become expensive squad players, which brings media scrutiny, and a very expensive asset sat on the bench who is difficult to sell on because they're on good wages and mid table sides can't afford to spend the same fee United paid in the first place. If it was a foreign player for 2/3rds the transfer fee this issue is mitigated a fair bit.
So, I think some people have some justification in opposing these signings. We've had some let downs in recent years, but also, it would seem perhaps a better solution would be to fill the homegrown quota with academy players and cheaper punts - players with less time on their contract, or players from low PL sides or from the Championship, in recent years like Robertson, Maguire (to Leicester), Bowen, Watkins, Eze, Wharton etc who would cost 1/3rd the price or so, and can challenge for a squad role but its less costly if they don't become a first XI player. With big money signings reserved for top level when they become available (Bellingham, Grealish, what people expected of Sancho).
However it's not that clear cut. City signed some cheap British squad players like Delph, Phillips, with mixed success, but they also spent big on Stones and Walker. Stones at the time was far from a guaranteed success, he was still raw. And for every Eze or Wharton or Robertson, there are 5 cheap signings who do either poorly or just okay. The fees have become increasingly insane in recent years for even players with good potential but far from sure fire bets, British or not.
I think the negativity towards this signing is partly justified. However, it's partly just based in fear - fear of repeating our mistakes with the likes of AWB and Maguire. Ultimately, Branthwaite is not AWB or Maguire, and it needs to be judged on individual merit. If he became a starting CB in a successful side, the price tag would be more than justified. If he spends years in and out of the side and not meeting expectations, it is costly. If an equivalent could be bought for £20m less - then what? Do we sign one extra £20m player - but squad size isn't really an issue. So, do we spend the extra £20m to buy, let's say, an £80m midfielder instead of a £60m midfielder in order to get the best available? But then, are we even in a position to get the best player available, or will they be choosing the likes of City, Liverpool, Arsenal Madrid over us anyway?
There's so many variables, I don't think it's possible to have a strong opinion at this stage. Most people will have some level of hope, some level of trepidation, some other perfect preference or vision of how it unfolds. But nobody knows. Not the best managers, scouts, DoFs, chief execs, and certainly not the average fan.
Whatever, just some ramblings whilst I have my morning coffee.