I think NV is going to try to fix the performance in TW3 and Project CARS because that has been the main complaint from that GeForce thread where NV Kepler users got really ticked off.
As far as 750/750Ti Maxwell 1.0 cards go, the performance optimizations for them hardly matter as they are very slow. Even if a driver improves their performance 5-10%, it's still slow.
http://www.computerbase.de/2015-05/...ergleich/2/#abschnitt_leistungsratings_spiele
For cards like 680/770/780/780Ti/OG Titan, it makes a lot more sense that NV spends time helping those owners because most of the gamers who got these cards didn't pay $100-150 for them with the expectation that the card was low-end to start with like the 750Ti was. If NV optimizes drivers better for Kepler over the next 18 months, a lot of those gamers can hold out until Pascal. I presume the gamers the reason the gamers are up in arms over this is because they didn't exactly plan on getting Maxwell cards this round or otherwise they would have just sold their Kepler cards and gotten Maxwell. They are understandably upset since they likely desired to use these cards for a bit longer.