A few thoughts on this thread:
ES:
- FWD is generally "good enough" in bad weather, and I think that adding optional AWD might elevate it to a higher position when Lexus wants the GS to be the midsize sedan with an AWD option
- Putting the 2.0T into the ES poses one problem: it requires premium fuel in a vehicle that has historically always taken regular. That might sound insignificant to some of us, but many ES consumers are very cost conscious and would probably see this as a turn off.
- ES will never be RWD - that is GS!
IS:
- I believe that we will see Lexus follow suit with what the Germans are doing and drop the "t" in favor of a numerical designation that reflects a displacement of a similar sized engine. I do believe that we will see 2.0T renamed as "300" instead of "200t." That means IS300, RC300, GS300, and probably eventually NX300.
- If Lexus' next generation of gasoline engines are all (or mostly) turbocharged, the naming there will get messy quickly. Think about it: LS 500t L, GS 200t F Sport AWD, IS 350t F Sport...it's just a little "too much."
- I think we'll see "h" stick around for hybrids and of course "F" for performance, but I assume that "t" will go away.
The only case I can see for a 3.0L V6 is for it to be turbocharged, which would probably be more like a "400" than "300t." A big part of this naming piece is marketing, too. "GS 300" sounds more substantial to a consumer than "GS 200t." Same for (hypothetical) "LS 400" than "LS 300t" if the next gen LS is to have a standard turbocharged V6 option.