It's a problem...
Yes, at heavy weights, it's a problem. On the 93T version of the
321s, the Vfe is 235, instead of 230.
According to the FCTM, assuming you are careful in not gaining
too much speed while going from Flaps1 to Flaps 0, and assuming
you're really heavy...like 89T....you may encounter Alpha Lock...
and this is to be considered "normal"...."Normal"in the sense that
it is somewhat expected....and is NOT to be considered your fault.
Exceeding Vfe is not good....but, in the case you described, I'd
say screw it....if you get into trouble with the chief pilot, just
nicely explain what happened.... While five knot overspeed is,
technically, a limitation violation, it is not the end of the world.
If five knots over will cause damage to the slats, then it woulc
be better to buy a Boeing.
Don't sweat it...
It happened to me one morning. We were at max 89T for
takeoff (or slightly under)....I was flying....called for FLAPS
ZERO at "S"speed....we were in moderate turbulence...and
we hit 230 knots without the slats being fully retracted. I
guestimate we were at about 232 or 233 when the slats
were completely retracted. I couldn't have cared less....
Not my problem.... BTW, the autopilot was on at the time, too.
So, blame it on the autopilot....