The ZX-14 is a great bike.
I have exact opposite opinion than you. The wing is a boring old man cruiser. It’s heavier and handles like crap compared to the k1600. And yes, the extra power on the street at anything over 30 miles per hour is absolutely shaming of the Goldwing. Now, this is comin from a guy who had 2 k1600s and is on his 2nd goldwing.
The K1600 was so flawed it was incredible. First, it was impossible to get comfortable on. You can say that's a personal issue but I talked to so many K1600 owners who felt the same way. Turns out BMW had a very weird take on the rider's body triangle that fits a very specific body.
A more important and fundamental flaw was that BMW made the bike unstable so it seemed "frisky". That made for the most annoying touring bike ever. You had to watch the thing constantly or it would veer off the road. There was the left pull under power that BMW refused to admit to and finally said "that's a consequence of the design, get over it".
Then there are the huge parts failures that go way beyond minor quality control failures. Like the transmission fiasco. BMW's response? "Your transmission could explode, so we are telling you so it's your fault if you decide to ride it while you're waiting 6 months + for us to figure out a fix".
What about the throttle? It felt more like a ride-by-string system. You are in a low-speed maneuver and you call for power to help counter the bike's designed-in instability and it's not there - over you go. So after spending $30K+ on a bike, I had to spend another $1K on a tune to fix the throttle and get the power usable. You had to get the flashing kit too because you had to return the bike to stock each time you had it serviced so the mother ship wouldn't find out you fixed their mess when they hooked the bike to the network.
Or the reverse that worked exactly once. After that it just chunked. BMW's answer: "We're working on a fix for that but don't keep trying to use it or it will void the warranty". My dealer said I was a big boy and what do I need a reverse for.
Then there was the power. Was the K1600 the fastest bike in its class? Absolutely. But do you get a prize for being the fastest turtle? In my opinion, the K1600's speed only impressed people used to Harleys and other extremely slow bikes. A very fast K1600 would get smoked by a ZX-14 in the first 3 gears and then the Kawasaki would disappear into the sunset. Further, the Kawasaki would do it with 2 fewer cylinders, a fraction of the complexity, 150 lbs less weight, better handling, and 1/2 the cost. On top of all that, the K1600 was so unstable that they had to electronically limit the top speed to 110 mph on some models. What's all the fuss about?
Technically, the K1600 was a marvel of a bike. As you would expect from BMW, it was mechanical art - a technical tour de force. But the intent of the bike was never clear. It was fast, but not really fast. By the time that 160 hp got to the ground, there was only 110 HP left (if you want a fire-spitting touring bike, opt for the Ducati Multistrada's 160
real HP). The BMW was not boring, but nothing special either. The handling was quick, but it sacrificed stability which is the priority on a touring bike. I could never understand how BMW could make these fundamental design errors. Then I got the 1250 GS and I realized the bar for the K1600 was set by the 1250. The 1250 is fast, fun, flickable, yet rock-solid. It's pretty close to the perfect do it all bike. I think BMW's goal was to make an 850 lb touring bike that compromised nothing. The perfect bike for the aging hooligan. They failed.
I got my bike in 2018. At this point it was clear BMW was not putting any more effort into the K1600 platform and focused on the K1800 as their touring platform. They just hot-wired the starter motor to get the reverse, and it failed so miserably they didn't even try to fix it. The bike didn't progress much past its introduction, and it turns out the 2012 model was clearly the best iteration as patchwork adds worsened an already suspect dependability.
In the end, I realized I had been taken. The bike was so bad I couldn't even trade it in on a GoldWing (or a Triumph, or even a Suzuki). The Honda dealer said he couldn't even get $10K for a 1-1/2-year-old $30K bike with 6K miles. I even considered crushing the bike on YouTube and eating the loss. The only reason that didn't happen is that the guy at the junk yard wouldn't let me video it.
I got to ride the new generation Goldwing. It puts the BMW to shame in almost every way. The K1600 is faster and turns better, but it can't hold a straight line or cruise at 100+ speeds safely (according to BMW themselves, BTW). What the heck is a touring bike supposed to be for anyway?