Been playing pinball for 4 decades+. EVERY pinball game I've played (apart from the bagatelles of my youth) are based on flipper skills, and usually some (minor) plunger skill. Flippers are here to stay, along with some auxiliary scoring/pf features like pops, ramps, spinners.... The cannon is a 1-off toy (OK, there was a similar one in STTNG, and maybe Dirty Harry?) that is too critical to overall scoring--takes much of the scoring opportunity away from the flipper skills. It's not a "new kind of skill" b ut a 1-off novelty, like the cannon in Black Rose.
And who says "die hards" (whatever that means) aren't good at T2?