There is plenty of chance to demonstrate maturity on the date, without having to predate the actual date before the date of the date with a mini-date on an earlier date to arrange the date.
The system of shidduchim being suggested and arranged, ensuring compatible people meet, and then they can determine if they are suitable for marriage, is not broken. There may need to be more networking among shadchanim, different ages getting married, whatever, if there is a need to be met. But more networking between the actual participants before the dates commence is unnecessary, unworkable and problematic. On the dates they can communicate with each other without any barriers being necessary.
Just sayin’