Honestly I don't agree with you on your points here. I've been using it since 2011 and not even once it took more than a day (as you said days) to get confirmed. These cases could only happen if you used lesser amount on fee as required but if anyone uses the standard one, it won't take that long. It never meant to give full anonymity that's why it's pseudonymous. A technology like this doesn't need to be tweaked all the time just so it would be 100% modern to the eyes of some, specially when everything is working just as how it supposed to be.