The only major problem with a large in-RP police force is the same problem presented with a lack of them; wanting to force things or ignore things by individuals who think the RP 'badge' gives them power over others. I've seen this happen in various other MMOs where there's a lore backed or official police force and people play guards or members of this force. While some are fine roleplayers, you do have the ones who just want to play a cop to be an asshole cop, and try to harass, arrest, or otherwise bother people for the tiniest infractions, all the time, and then pull the 'well in the lore/canon/etc our police force is valid so you have to listen/obey/etc.
Not everyone will do this. But it has been done, so any large group of police characters like that has to be done with extreme care, lest they become the bullies. And considering the Blades often have a lot of assholes and corrupt people on their force, you might find this kind of play becomes more attractive in such a group. Not saying it will, but just that it can, so it's good to know who your members are and that they can be trusted not to cause toxic RP. Overwhelming with numbers can also eventually cause tension (been on the receiving end of this before), and while it's what a realistic police force would do, it has to be handled carefully or it turns into one big Charlie Foxtrot.
On the flip side, the idea of a brass blades group that creates a little tension here and there within reason, roots out its own corruption, tries to reform 'bad cops', and so on might make an interesting bit of pre-modern police drama, which I don't see any of, really. The conflict of those who want to serve and protect, vs those who want to make money and climb the ladder is great for RP within such a police force. Makes for some delicious conflict.
Not everyone will do this. But it has been done, so any large group of police characters like that has to be done with extreme care, lest they become the bullies. And considering the Blades often have a lot of assholes and corrupt people on their force, you might find this kind of play becomes more attractive in such a group. Not saying it will, but just that it can, so it's good to know who your members are and that they can be trusted not to cause toxic RP. Overwhelming with numbers can also eventually cause tension (been on the receiving end of this before), and while it's what a realistic police force would do, it has to be handled carefully or it turns into one big Charlie Foxtrot.
On the flip side, the idea of a brass blades group that creates a little tension here and there within reason, roots out its own corruption, tries to reform 'bad cops', and so on might make an interesting bit of pre-modern police drama, which I don't see any of, really. The conflict of those who want to serve and protect, vs those who want to make money and climb the ladder is great for RP within such a police force. Makes for some delicious conflict.