Regarding some LW users saying "they dont need Vray" - this is true, some said it and keep saying it.
But remember LW userbase is pretty strongly split between hobbyists and pros.
Despite it's age-ness, LW has still some very strong points in archviz arena, so there's a not so small number of archviz users using it.
The large part of hobbyists (which are the ones who post the most on NT forums) are pretty much conservative regarding anything, in fact there are other flames going on for years regarding several other aspects of the software (it's ok as it is now VS we need deep changes).
Consider also that hobbyist userbase part went to LW because of price reasons and some of them are pretty much against everything has a high price, because they wouldnt get paid back from the investment. Vray is quite costly as renderign solution (probably the most costly between all solutions), and this is another reasons lower-profile LW users were against it. BTW, any pro knows that Vray will pay for itself in a very short period so pricetag doesnt matter really.
So, please dont take NT forum as a reliable source of infos about what users need/want, its a vert small part of the userbase and at same time the most talkative.
Being in LW arena since 5.0, i know most pros - if not all pros - are interested in having more rendering options and Corona is the kind of engine LW misses the most.
Again, as i read here, Corona will be friendly priced, which will make it quite interesting not only for pros.
Best,
Paolo