Tundra 2025 towing - is the rear air load leveling needed with a WDH? Is AVS great for ON-road?

Aloha, we tow a travel trailer (only 4000 lbs) with a weight distribution hitch (currently with our Taco) - are deeply in analysis paralysis with Tundra 2025 shopping. So, would having the rear self air leveling option on a shiny new Tundra really add anything we don't already get by using our WDH? Also reading up about the AVS (Platinum only). We are super interested in the best ON road ride possible - so the Platinum AVS is awfully tempting... We are still somewhat confused about the TRD off road package - we want a comfy road ride and don't go off road (other than gravel roads once in a while) - the downhill assist seems cool - but our mechanic said he would choose air leveling over the TRD off road package for comfort.... So many stinkin choices to really understand.... We want to tow a light travel trailer, have great long comfortable road trips, have a nice daily driver, and not overly spend on stuff we don't need/want.