Always the same story with GM... build a vehicle with somewhat interesting exterior design, slap a cheap standard interior, pick one of their 30 year old engines and price it low enough that even with all its flaws, some people will buy it.
Only new engines that came out of GM in like 30 years are the Ecotec and the 5 cylinder in the Colorado.
Sounds to me like that 5-cylinder is getting great reviews and would be the perfect candidate for the Equinox!!