Facts is, consumers are really stupid and engineers/marketeers are really dishonest. We have a chicken and egg situation.
From all so called expert analysts, they still cannot figure out why there is demand for CUVs/SUVs (defined as FWD or RWD based unibody structure with fully independent suspension). I call this blind herd mentality. For whatever argument there is for SUVs/CUVs, there is an alternative better product.
The SUV/CUV market is not mature yet, because no strategist understands the dynamics. This market will be mature once BEVs go mainstream. Thus most SUVs/CUVs on sale right now are immature products, lost in the transition from 4x4 (body-on-frame RWD based off-road vehicle) to what I would call APAV (All-Purpose-Activity-Vehicle, the SAK of personal transport).
So what should the next LX be? For the time being, a luxurious (not bling) and well performing on-and-off road SUV (RWD based unibody with FIS). Can Lexus do that? Yes, will customers buy? Yes if high quality, reliable, and with character/identity. Will I and others (Russians, Arabs,...) be interested in it? Probably, but not necessarily what I and others might be looking for.
Does Lexus need a BOF SUV? I am not sure. Using SUVs/SUTs/Trucks, I am not interested in luxury, comfort is a different thing. I do not expect a truck to drive as a sports car, nor does any SUV drive anything like a sports car. The only way to get excellent on-and off-road performance is with a 4-electricmotor, 4-wheeldrive, 4-wheelsteer BEV, with from scratch developed new suspension geometry with automatic variable height and camber adjustment. Won't ever happen due to costs.
Conclusion: As I have mentioned many times, the market is saturated with redundant and compromised products, that do not fit the needs of any group. Lexus does not need any BOF SUV, because few customers really use them as intended, and Lexus does not have the status of Mercedes, Porsche, Bentley, or even Audi (subtle or understated luxury). The RX is yet based on old platform, should stay that way and be replaced by new RWD based platform (if yet viable). The LX should be the SUV version of the LS, fit between X5 and X7 size wise. The GX should be dropped, unless "cheaply" re-badged next Land Cruiser Prado.
The Land Cruiser (300?) should remain BOF, and hopefully also in base NATO spec with updated diesel engine, V6 or I6. Solid front and rear axles should be available as an alternative to independent front and rear suspension. That is what make the Nissan Patrol (Y61) a with I6 turbo-diesel a great car.