Some are good, some are idiotic.
While Apoc is a great game, it was never as popular, and my bet has always been that this was because of its additional complexity - each new bit of technology the aliens introduced, for example, may cause you to entirely rethink your tactics in battle. It takes an age to get anywhere (even keeping in mind that just about everyone plays it in realtime, despite the option of turnbased gameplay), but you're always being introduced to new stuff... and this is keeping in mind the game development was considered unfinished.
UFO is a lot more fast paced (you can win an entire campaign on your day off if you know what you're doing), and battles really don't change all that much. Even if you didn't get handed the "best gun" very early on, just about everything on the battlefield is lucky to survive a single hit, so knowing how to play the game is far more important then having a fully unlocked tech tree.
Er, putting aside the matter of psionics.
So much as I hate to suggest it, as much as I'd love to see them consider Apoc's features and level of content the benchmark to work from, I suspect they'd be better off sticking to the simplicity of the first game.