I have replaced my front fender on my 700 because it rattled too much. I have these that are attached with zip ties. They offer plenty of protection and are quite robust.
https://reciprocators.ca/products/rrp-proguard-max-protection-front-cable-tie-velcro-fitment
I can't answer the noise question without having tried yours but on my 700 XR, the speed seems to reflect reality. I use a secondary bike computer with a integrated led light. It computes de cadence and speed and it is pretty similar with the 700 display.
700XR is a great bike for gravel and dirt but not designed for mountain biking on single tracks. I would suggest however, for overall comfort, to get a suspension seat post. I use the Suntour post and very satisfied.
for my PAS setting, I always set it with 0 (0-7, 0-9...) This way I find that it's safer when in 0 to control the bike in tight squeezes or doing a tight U-turn and not accidentally pedalling and surging forward.
tire wobble wont affect brake rubbing. Align your pads and make sure the disk is not slightly warped. Tons of videos on Youtube. The easy way to align the pads is loosening the calipers, squeeze the brake lever and tighten the calipers while still holding the lever. For the wobble, ride the...
XR Bought last year... later last summer they started shipping with the fixed stem. I believe they went back to adjustables. They keep changing features from one batch to the next.
My 700 came with an ajustable stem and this can help to rise and bring back the bars for a more upright position. I prefer that look to the swept back.
I bought my 700xr last year in March also ( came in late April ) and if I remember correctly it was listed at 1000 peak. Ride1Up changed that to 850 the next batch. It had an adjustable stem and cruise instead of the walk mode. The LMTD was not available at the time of purchase but I wouldn't...