Normal is no deflection other than compression loading of the rubbers.

You already know, or at least suspect this.

Tear her down and expect to see wore out bushings as a minimum....Wallowed out pivot holes as the max.

She must be all over the road when you brake.

Are you running oversized tires/wheels and lots of off-set?

I've seen A-arms comme clean off while driving...not pretty on a two lane with oncoming traffic.

You be careful out there.