I'm crossing my fingers for it. It looks like Last Light in particular is basically just getting a "GOTY" release with a few extra tweaks to the engine for performance and/or graphics, but porting Metro 2033 to the modern 4A engine is fantastic and should make what is already a gorgeous, immersive game into an even better experience. Metro 2033 suffers from some serious issues with regard to its DX11 features in particular, with Advanced Depth of Field not adjusted or optimized well, so badly that it's good for a solid 20FPS hit on my 780Ti. And the PhysX implementation in Metro 2033 was really mediocre, too - volumetric cloud calculations instead of really good sprite/vectors, a little more dust from bullets impacting, and ...
So I'm definitely looking forward to THAT making it over to the modern 4A engine. Last Light getting a "complete" release and all that is great, I'm happy that they're offering -50% since I own both previous games, but I already bought all the DLC for it - I kinda feel like they ought to be giving it away to anyone who already bought Last Light and kitted it out, but when has Deep Silver -ever- decided that instead of doing something to make a lot of money, they'd prefer to just be cool to their customer base? I hate that THQ died, because they were such a cool publisher by way of comparison. Deep Silver snatched up most of their assets, and their practices are far, far, far more aimed at financializing than THQ's were.
Which may be why THQ went under, but still. Call a freakin' GOTY release a GOTY release. Metro 2033 is getting the big overhaul, haha. Either way, I'll inevitably reward them for this by buying the games, I'll just grumble slightly under my breath while doing so.
I imagine they're re-publishing them like this for two primary reasons:
First, to establish a new working relationship with 4A studios and get a retail product out - Deep Silver became their publisher via auction right as Last Light was going gold, and frankly THQ had done practically nothing to promote it sufficiently. Because they were broke. Remember how long it took to go from "you can buy it on Steam right now" to having retail copies for PC?
Second, to take advantage of the extraordinarily scalability of the 4A engine to get a "new" retail product out for current-gen consoles. This was a pretty game when it was being forced to run on hardware from the mid 2000s; now that there's some actual processing power to throw its way for both graphics and compute, it's not at all unprecedented to re-release it like this. At least they're not going all Ubisoft on it and refusing to release the improved version for PC even though PC could run it absolutely fine.
I'm hoping we get new trainers, as I imagine these will be pretty popular games, but we'll see how it goes I guess!