I never used to think that The Smiler was overly rough, but I think it's gotten a lot more rattly with some more pronounced jolts in recent years. In a rather odd coincidence, I actually think that my rides post-incident have been distinctly rougher and less comfortable than my rides in 2013 & 2014, for the most part. Oddly, I've also found the Gerstlauer OTSRs less comfortable as I've grown taller; I've noticed that they close very lowly on your shoulders compared to the ones from B&M, for example, and there's a bit at the bottom of them that squashes your crotch. Is it only me who's found the restraints a bit uncomfortable?
To be honest, I used to love The Smiler; when I was a younger enthusiast, it was my 2nd favourite at Alton behind Nemesis and stood solidly in my top 10 for years. It'll always be an important coaster to me simply because its construction & opening in 2013 was arguably the thing that first led me to the enthusiast community. However, in recent years, I've found myself going off it. This is probably in part down to my tastes changing to gravitate more towards fun, comfortable and rerideable coasters as opposed to solely intense coasters, as well as me riding more coasters and different types of coasters, but I also think that the ride itself has aged quite considerably since I first rode it.
I admire the ambition behind The Smiler, I think it's an absolute masterpiece of engineering, I can completely understand why someone would love it and I know that a glass smooth coaster with that much track in that little space would be nigh on impossible to produce, but I just don't really think it's my kind of coaster anymore.