Soldato
HL2 Remix will be optimised to the max by NvWhy would NV need to optimise the game code with the mod? NV provide all the tools to implement the mod, the dev/author then needs to optimise what they've done.
That's like saying all Unreal Engine games need to be optimised by Epic, when it's the devs that must be doing that part of the work, not Epic.
But your likening the optimising onus being on a modder/dev/author on a free mod to the same standard as employed devs for a paid for game.
You wouldn't expect a hobbyist photographer to produce the same standard of professional photography like yourself.
Think it's time to temper expectations on what we're going to be getting from Remix as personally can't see a lot of author highly optimised releases.