No, Crawford is 24 and flatlined, at some point "potential" is a dirty word.
You have this fixation on age at the expense of all other factors.
His AAA performance was a BABIP artifact (.381, well above his career minor league norm).
In Seattle, he hit .231, wRC+ of 90.
Now he should improve, but I doubt it'll be anything drastic.
Galvis bloomed later, b/c he was jacked around by the Phillies instead of being left in AAA to develop at age 23.
Better fielder than Crawford, but wRC+ has gradually increased, 76, 74, 79, 84, 89.
Now I'm no fan of Segura, who had an offseason and should bounce back next year, but only has a couple solid seasons left in him. But he was an upgrade over Crawford, though they could have probably just gone with Kingery for a year or two.
Hopefully, Stott will turn out to be better than all the above options in 2-3 years.