I couldn't find much in the history about the fuel filter being changed. The pump gave signs of giving up the ghost for awhile in retrospect.
It would occasionally have trouble turning back over right after shutting it down. Once the pump got switched out, never had that problem again!
The GX is a bit larger, but not by a dramatic difference. The V8 to V6 is the most noticeable change. It's certainly not a whale like a 200 Series, but the larger cargo area is perfect for the dog and will still fit through PNW trails.