Interesting concept but you need to be more clear… how if someone decides they want to meet someone after they conversed with them bla bla bla… do they contact that person without letting everyone know who they are? Is that something they’d contact YW for?
But its also still DIY. and getting to know someone online isn’t the same as face to face. What you’re proposing is online dating – if you go on frumster thats also annon you don’t have to give your real name – you don’t have to post your face – you can get to know each other without any details except for gender and brief description etc… then if you want to you can exchange other info.
The POINT of a Kosher Shidduch is to eliminate the emotions and time spent on getting to know someone who its really quite straight forward that they’re not for you. (You want cholov yisroel only – and they don’t care…). It can be basic things like that, that you wont find out till you already like the person. That is what Shadchanim are trying to avoid….