I the past, with C kites, the chicken loop were dangerous as it is often
very difficult to get out of the chicken loop when under extreme load.

So the manufacturers have made it over the years easy to get out of the
chicken loop (when under heavy loaded or not)

With the new generation of flat kite, the chicken loop is now the safety
leash (with a back up safety leash) and it is NO LONGER require to get
out of the chicken loop when under load because as soon as one let go of
the bar, the load is often light and one can leisurely get out of the
chicken loop in light load (I did that yesterday while self landing my
Waroo 9m in 30+ knots)..

Personally, it happen to me at least twice that my chicken loop (from at
least 2 different manufacturers) of my flat kites popped out when under
extreme load and that make the situation dangerous (the kite powered up
even more or become uncontrollable). In this situation, the kiter may
not be in danger but the bystanders may be heavily hit by the kite or
the kite could hit hard obstacle and get damaged.

So is it now the time for the manufacturers to consider making the
chicken loop more heavy duty and difficult to get out under heavy load?

Hung.